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Wiring in an oxy sensor and is a relay needed........... #2434591
01/14/18 07:54 PM
01/14/18 07:54 PM
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Thumperdart Offline OP
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Trying to figure out weather a relay is needed or not in line on the power and grounds. It was suggested but it's not on the Innovate sight............... beer


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2434593
01/14/18 08:01 PM
01/14/18 08:01 PM
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Mt Morris Michigan
mopar dave Offline
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Dom, what i have is a Painless wiring fuse box for all my added accessories. It has its own relay and holds 7 fuses. I have my Innovate plugged into this box as well as all added acc. Only thing wired to the original fuse box is what came on the car. Hope this helps.

Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2434594
01/14/18 08:03 PM
01/14/18 08:03 PM
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Tulsa OK
Bad340fish Offline
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No, the unit doesn't draw much power. If you have noise problems try running your power and ground for the controller right to the battery.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: Wiring in an oxy sensor and is a relay needed........... [Re: mopar dave] #2434685
01/14/18 11:02 PM
01/14/18 11:02 PM
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Mt. Vernon, Ohio
dartman366 Offline
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Originally Posted By mopar dave
Dom, what i have is a Painless wiring fuse box for all my added accessories. It has its own relay and holds 7 fuses. I have my Innovate plugged into this box as well as all added acc. Only thing wired to the original fuse box is what came on the car. Hope this helps.
I have the 6 switch version of the same box and I run my lm-2 from the switched 12 volt engine run switch and grounded to a bulkhead stud for grounds this has all my grounds tied together and a main ground wire back to the battery including the engine ground I am also using the rpm function and that has the tach signal coming straight off the tach post on my 7al and grounded to the same battery ground, no relay, have not seen any goofy readings with mine.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Bad340fish] #2434751
01/15/18 12:20 AM
01/15/18 12:20 AM
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Thumperdart Offline OP
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Man, it sukz not knowing electrical stuff but am slowly figuring this stuff out thankxx to you guys............... thumbs


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2434823
01/15/18 03:03 AM
01/15/18 03:03 AM
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Posts: 1,260
New Mexico
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Adobedude Offline
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New Mexico
No relay needed for it, but I'm pretty sure it calls for an inline fuse...if doesn't, add one.

Wire 101: Run a large isolated ground from battery to mid point in the car and ground everything to that, don't use the chassis for ground.
How large of a ground you ask? add up your amps used and grab a chart off Google. Once you realize power flows out of the negative side of the battery it all makes sense


2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Adobedude] #2434940
01/15/18 12:33 PM
01/15/18 12:33 PM
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Posts: 19,237
north of coder
moparx Offline
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Originally Posted By Adobedude

Wire 101: Once you realize power flows out of the negative side of the battery it all makes sense


something most miss, or don't understand. thank you for posting this.
beer

Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2434995
01/15/18 02:33 PM
01/15/18 02:33 PM
Joined: May 2006
Posts: 739
WA
JD Dart Offline
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WA
And since the data logger is seeing 0-5 volts the ground reference should be the same ground as the data logger. But that's only important if you want to see accurate readings.


best so far 8.53 @ 158.59 MPH 60'1.240
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Adobedude] #2435109
01/15/18 06:07 PM
01/15/18 06:07 PM
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Thumperdart Offline OP
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Originally Posted By Adobedude
No relay needed for it, but I'm pretty sure it calls for an inline fuse...if doesn't, add one.

Wire 101: Run a large isolated ground from battery to mid point in the car and ground everything to that, don't use the chassis for ground.
How large of a ground you ask? add up your amps used and grab a chart off Google. Once you realize power flows out of the negative side of the battery it all makes sense


Actually found a page where the relay is used so I'm under the dash now and going to see if I can burn this thing to the ground............ panic


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: mopar dave] #2435195
01/15/18 08:47 PM
01/15/18 08:47 PM
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Thumperdart Offline OP
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So, I had the wb gauge hooked up directly to my ign. switch which went directly to my msd box so I installed the relay in line w/the gauge and hooked the batt. lead to ign. on and same damn thing. Gauge goes crazy till I turn the headlights on.............I'm lost and totally wiring challenged so maybe a filter of some sort?????????????


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Bad340fish] #2435219
01/15/18 09:20 PM
01/15/18 09:20 PM
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Thumperdart Offline OP
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Originally Posted By Bad340fish
No, the unit doesn't draw much power. If you have noise problems try running your power and ground for the controller right to the battery.


Just called Innovate and they said at LEAST run the 12 v feed to the battery stating that it acts as a filter so I will tackle that right now and go from there.......... realcrazy


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2435239
01/15/18 09:52 PM
01/15/18 09:52 PM
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Cotati, CA
Dave Hall Offline
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Yes. Use a relay. Provides best power straight from the battery and is switchable with low amps. Some drag guys like to turn them on to let them heat and stabilize before making a run. You can switch a relay with ground instead of power going through the switch.

Re: Wiring in an oxy sensor and is a relay needed........... [Re: Dave Hall] #2435245
01/15/18 10:03 PM
01/15/18 10:03 PM
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Thumperdart Offline OP
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Thankxx, so what size wire from under dash to the trunk............ beer


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2435281
01/15/18 11:03 PM
01/15/18 11:03 PM
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Cotati, CA
Dave Hall Offline
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10 gauge is fine.

Re: Wiring in an oxy sensor and is a relay needed........... [Re: Dave Hall] #2435289
01/15/18 11:10 PM
01/15/18 11:10 PM
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Thumperdart Offline OP
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Just for a test I ran a 14 gauge wire straight to the battery and boom, problem solved...........I feel super stupid but lesson learned and a battery IS a filter........ beer


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Dave Hall] #2435387
01/16/18 01:33 AM
01/16/18 01:33 AM
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Thumperdart Offline OP
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Well, this whole time it's been wired wrong and even though I got readings, they were not stable like now at least at idle and will test drive tomorrow. Older cars like some of ours especially w/stock wiring, don't have any filters/relays like the newer stuff so it makes sense as an Innovate tech told me today that the battery IS the filter in my case and in similar cars/trucks..........I appreciate all of the help and it opened my eyes a lot about automotive wiring and charging systems so we'll get er tuned in cos the wb used to show rich and the plugs said otherwise. We will find out soon when I go back to the track w/ft. n rear Viking shocks and tubes in the QTP's shootin for a 1.29 60, 6.000 at 113+ mph................ luck beer

Last edited by Thumperdart; 01/16/18 01:33 AM.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2435501
01/16/18 10:42 AM
01/16/18 10:42 AM
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Val-haul-ass... eventually
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BradH Offline
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Originally Posted By Thumperdart
... the wb used to show rich and the plugs said otherwise.

Any feel for how different the old vs new readings are?

Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2435560
01/16/18 12:40 PM
01/16/18 12:40 PM
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Central TEXAS!!!!
sr4440 Offline
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FYI, a single o2 sensor draws <3 amps when warming up. When i am warning up all 8 O2's at the same time, the power draw is 23 amps.


Joe


Without Data, you’re just another guy with an opinion.
Re: Wiring in an oxy sensor and is a relay needed........... [Re: BradH] #2435668
01/16/18 03:04 PM
01/16/18 03:04 PM
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Thumperdart Offline OP
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The difference is that it reads solid now instead of variable/scattered readings and will test later to see how the whole range is from idle to 7000+ rpm's............I really do learn something new now and again so thankxxx............... thumbs


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Wiring in an oxy sensor and is a relay needed........... [Re: Thumperdart] #2435747
01/16/18 04:59 PM
01/16/18 04:59 PM
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jwb123 Offline
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We use one of the Innovate O2 systems on our dyno at school. They are prone to RF noise. Points distributors, and even the orginal point style dash voltage regulators can mess with them. Most likely the relay helps with the RF. As they mentioned ground right to the battery works best.

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