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Emergency battery shut off #1065894 08/30/11 12:51 PM 08/30/11 12:51 PM
Joined: Oct 2003 Posts: 614 ont,canada M mopartuner OP mopar
mopartuner OP mopar M Joined: Oct 2003 Posts: 614 ont,canada	My car is a 65 Barracuda with a stock(ish)wiring harness and I need to hook up a battery/car shut off switch.I am using a Moroso 2 pole switch.I allready have the pos cable from the battery into one side and the main cable to the starter out the other side.What I need to know is how to hook up the alternator part of this so the car will die as soon as the switch is turned off.Can I do this with just one wire going back to the switch or do I have to run a wire back to the switch and another back to the alternator? 410 pump gas solis flat tappet cam 10.95 so far

Re: Emergency battery shut off [Re: mopartuner] #1065895 08/30/11 01:01 PM 08/30/11 01:01 PM
Joined: Apr 2004 Posts: 12,339 somwhere S smokinwoody I Live Here
smokinwoody I Live Here S Joined: Apr 2004 Posts: 12,339 somwhere	this is how I've been doing mine...

Re: Emergency battery shut off [Re: mopartuner] #1065896 08/30/11 02:01 PM 08/30/11 02:01 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	You can just run the power wire straight back to the positive on the battery. You should use at least #8 wire alt to batter. Your amp gauge will no longer work so by pass it and get a volt meter!

Re: Emergency battery shut off [Re: Dodgem] #1065897 08/30/11 02:22 PM 08/30/11 02:22 PM
Joined: Apr 2004 Posts: 12,339 somwhere S smokinwoody I Live Here
smokinwoody I Live Here S Joined: Apr 2004 Posts: 12,339 somwhere	Quote: You can just run the power wire straight back to the positive on the battery. You should use at least #8 wire alt to batter. Your amp gauge will no longer work so by pass it and get a volt meter! and have you felt the switch after its been running for awhile...things heat up fast unless you have a switch rated for the amperage..

Re: Emergency battery shut off [Re: smokinwoody] #1065898 08/30/11 02:35 PM 08/30/11 02:35 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: You can just run the power wire straight back to the positive on the battery. You should use at least #8 wire alt to batter. Your amp gauge will no longer work so by pass it and get a volt meter! and have you felt the switch after its been running for awhile...things heat up fast unless you have a switch rated for the amperage.. I know mine is rated at 200 or 250 amps... you pull the starter load through it... I run the alt wire to the battery side of the master... been fine for 12 years now.... to me its the simplest way and very little to go wrong

Re: Emergency battery shut off [Re: MR_P_BODY] #1065899 08/30/11 03:47 PM 08/30/11 03:47 PM
Joined: Apr 2004 Posts: 12,339 somwhere S smokinwoody I Live Here
smokinwoody I Live Here S Joined: Apr 2004 Posts: 12,339 somwhere	Quote: Quote: Quote: You can just run the power wire straight back to the positive on the battery. You should use at least #8 wire alt to batter. Your amp gauge will no longer work so by pass it and get a volt meter! and have you felt the switch after its been running for awhile...things heat up fast unless you have a switch rated for the amperage.. I know mine is rated at 200 or 250 amps... you pull the starter load through it... I run the alt wire to the battery side of the master... been fine for 12 years now.... to me its the simplest way and very little to go wrong exactly... ya know its been awhile since I worked on the cars..if you use a rated constant duty solenoid, and when you shut the switch OFF...theres absolutely no power at the alternator.. if you tie it in to the battery side of the switch, there will be constant power at the alternator...ever run across the terminal on the alternator and get a big ark? this way everything up front is completely dead... sorry Mike...I knew there was a good reason for it all...LOL.. and...they do make a switch with 2poles..one with the 250 amp and the other rated at 30amp...those contacts can be used to power the solonoid on or off.... and here was my mess that worked great..see if you can follow the wires...I ran out of the #8 from the alternator so I paralleled the other side with 2-#10's bet I confused ya...if Rob sees this he will explain it better Last edited by smokinwoody; 08/30/11 04:49 PM.

Re: Emergency battery shut off [Re: smokinwoody] #1065900 08/30/11 06:25 PM 08/30/11 06:25 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	I ran double #10 for years because I had 25 feet sitting. now it's number 4.

Re: Emergency battery shut off [Re: smokinwoody] #1065901 08/30/11 07:20 PM 08/30/11 07:20 PM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	Quote: this is how I've been doing mine... Thats how I wired up mine also. 6802744-DSC00788(Large).JPG (48 downloads)

Re: Emergency battery shut off [Re: smokinwoody] #1065902 08/30/11 08:02 PM 08/30/11 08:02 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	if you tie it in to the battery side of the switch, there will be constant power at the alternator...ever run across the terminal on the alternator and get a big ark? this way everything up front is completely dead... sorry Mike...I knew there was a good reason for it all...LOL.. Dont short it out and you wont have a problem... I didnt want any more stuff on my car that can break..... you know the old saying...KISS... thats me

Re: Emergency battery shut off [Re: MR_P_BODY] #1065903 08/30/11 08:17 PM 08/30/11 08:17 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	Don't run a alternator, problem solved, but as Mike said don't short out the wires. In my 40 plus years of working on cars I can say I have never arced across a alternator wire and very seldom disconnect the battery to work on the engine even removing the alternator. Luck? maybe just paying attention. it's ok to butt heads, just don't do it with a butthead

Re: Emergency battery shut off [Re: Dodgem] #1065904 08/31/11 08:10 AM 08/31/11 08:10 AM
Joined: Oct 2003 Posts: 614 ont,canada M mopartuner OP mopar
mopartuner OP mopar M Joined: Oct 2003 Posts: 614 ont,canada	Quote: You can just run the power wire straight back to the positive on the battery. You should use at least #8 wire alt to batter. Your amp gauge will no longer work so by pass it and get a volt meter! So all I have to do is take the wire off the alt(the one held with a 7/16 nut) and run it back to the battery side of the switch and then I have to run another wire off the other side of the switch up to the altinator? 410 pump gas solis flat tappet cam 10.95 so far

Re: Emergency battery shut off [Re: mopartuner] #1065905 08/31/11 08:44 AM 08/31/11 08:44 AM
Joined: Feb 2010 Posts: 1,377 Ohio Todd pro stock
Todd pro stock Joined: Feb 2010 Posts: 1,377 Ohio	No. As long as there is absolutely nothing else connected to that wire. The wire from the alt to the battery needs to be all by itself. Leave the wire on the alt and hook the other end to the battery or the battery side of the switch. The reason for using a constant duty solenoid is so that when the main switch is turned off it kills the power to the alt.

Re: Emergency battery shut off [Re: MR_P_BODY] #1065906 08/31/11 12:02 PM 08/31/11 12:02 PM
Joined: Oct 2007 Posts: 3,978 Hilltown Pa 1967dartgt master
1967dartgt master Joined: Oct 2007 Posts: 3,978 Hilltown Pa	Quote: if you tie it in to the battery side of the switch, there will be constant power at the alternator...ever run across the terminal on the alternator and get a big ark? this way everything up front is completely dead... sorry Mike...I knew there was a good reason for it all...LOL.. Dont short it out and you wont have a problem... I didnt want any more stuff on my car that can break..... you know the old saying...KISS... thats me But this way is not nhra legal must run solenoid to be legal. Brett Miller W9 cnc'd heads STR Chassis fabraction

Re: Emergency battery shut off [Re: 1967dartgt] #1065907 08/31/11 12:18 PM 08/31/11 12:18 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Quote: if you tie it in to the battery side of the switch, there will be constant power at the alternator...ever run across the terminal on the alternator and get a big ark? this way everything up front is completely dead... sorry Mike...I knew there was a good reason for it all...LOL.. Dont short it out and you wont have a problem... I didnt want any more stuff on my car that can break..... you know the old saying...KISS... thats me But this way is not nhra legal must run solenoid to be legal. Must be a NEW rule as of this year... the way I said was NHRA approved for YEARS and still passes tech at some tough tracks

Re: Emergency battery shut off [Re: MR_P_BODY] #1065908 08/31/11 02:50 PM 08/31/11 02:50 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Ever see a car burn because of a constant hot alternator wire? I have. The way I look at it, doing it the way woody suggest, I also use a starter solenoid, on my cars there is NOTHING hot outside a 2 foot cube in the trunk of the car when the master is thrown. Now for the failure part of the equation I carry a jumper wire to route around the constant duty solenoid. with a failure, that makes me no worse off than the constant hot route approach. I've never had a CD relay fail, knock on wood.

Re: Emergency battery shut off [Re: RobX4406] #1065909 08/31/11 04:03 PM 08/31/11 04:03 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Ever see a car burn because of a constant hot alternator wire? I have. The way I look at it, doing it the way woody suggest, I also use a starter solenoid, on my cars there is NOTHING hot outside a 2 foot cube in the trunk of the car when the master is thrown. Now for the failure part of the equation I carry a jumper wire to route around the constant duty solenoid. with a failure, that makes me no worse off than the constant hot route approach. I've never had a CD relay fail, knock on wood. The jumper would be a way to correct a failure of the solenoid .... as for a car burning.. yes but cant say it was a alt hot line that did it... mines been the same way for 12 years now and its mounted in rubber grommets Does anyone know for FACT that you need the solenoid to pass NHRA tech or is the way I have it still legal

Re: Emergency battery shut off [Re: MR_P_BODY] #1065910 08/31/11 05:13 PM 08/31/11 05:13 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Quote: Quote: Ever see a car burn because of a constant hot alternator wire? I have. The way I look at it, doing it the way woody suggest, I also use a starter solenoid, on my cars there is NOTHING hot outside a 2 foot cube in the trunk of the car when the master is thrown. Now for the failure part of the equation I carry a jumper wire to route around the constant duty solenoid. with a failure, that makes me no worse off than the constant hot route approach. I've never had a CD relay fail, knock on wood. The jumper would be a way to correct a failure of the solenoid .... as for a car burning.. yes but cant say it was a alt hot line that did it... mines been the same way for 12 years now and its mounted in rubber grommets Does anyone know for FACT that you need the solenoid to pass NHRA tech or is the way I have it still legal I haven't seen any changes, haven't looked except in the 2011 rule book and don't recall seeing anything.

Re: Emergency battery shut off [Re: RobX4406] #1065911 08/31/11 05:32 PM 08/31/11 05:32 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	I haven't seen any changes, haven't looked except in the 2011 rule book and don't recall seeing anything. Thats whats I'm guessing also... they dont care really how it kills the engine, just as long as it dies with the master

Re: Emergency battery shut off [Re: smokinwoody] #1065912 08/31/11 06:47 PM 08/31/11 06:47 PM
Joined: Oct 2007 Posts: 3,978 Hilltown Pa 1967dartgt master
1967dartgt master Joined: Oct 2007 Posts: 3,978 Hilltown Pa	Hey Mr p, this is how the my chassis inspector explained it to me, when you turn the car off by switch they want everything dead. I have never read it in the rule book but also have never looked and have wired my car that way with the solenoid now, used to have it the other way when he told me that. Brett Miller W9 cnc'd heads STR Chassis fabraction

Re: Emergency battery shut off [Re: 1967dartgt] #1065913 08/31/11 07:16 PM 08/31/11 07:16 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Hey Mr p, this is how the my chassis inspector explained it to me, when you turn the car off by switch they want everything dead. I have never read it in the rule book but also have never looked and have wired my car that way with the solenoid now, used to have it the other way when he told me that. Its the same old way then... if you shut the master off the engine must die along with the pumps and what not ... I'm not a NHRA member any more(as of 2 years ago).... I have a big suspicion that its a difference in wording.... he's saying everything but the engine has to die.... otherwise it would be in the book/online that its mandatory to have the solenoid in place Last edited by MR_P_BODY; 08/31/11 07:20 PM.

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