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Hall Effect Sensor Question #1791438 03/29/15 08:55 PM 03/29/15 08:55 PM
Joined: May 2004 Posts: 433 St.Clairsville Ohio EV2RUNNER OP mopar
EV2RUNNER OP mopar Joined: May 2004 Posts: 433 St.Clairsville Ohio	My Neighbor is having an Issue with an Ignition system he built on an old Jeep, He replaced the points with a hall effect sensor. It has worked great for him, today he pulled in and we were talking for a few minutes. The jeep was idling, and it just shut off, it was pretty easy to tell it was ignition related, it just shut right down,I thought he turned the key off.. Well long story short, we found it wasn't getting spark, we tested the coil with an Ohm meter it was good. Tested the distributor has 12V but cant get a ground signal out of it. I took the hall effect sensor and trigger out,ran 12V to the hot side ran a test light on the ground side and no matter how close I held or moved the trigger, I couldn't get a ground signal out of it. Im guessing the Sensor is bad, what do you guys think? BTW it is opposite of the OEM Mopar Hall Effect style..The magnets are on a collar on the shaft, and the pickup is on the side of the distributor. Thanks!

Re: Hall Effect Sensor Question [Re: EV2RUNNER] #1791439 03/29/15 09:19 PM 03/29/15 09:19 PM
Joined: Dec 2014 Posts: 5,960 ohio R ruderunner master
ruderunner master R Joined: Dec 2014 Posts: 5,960 ohio	Pics? Brand? Angry white pureblood male

Re: Hall Effect Sensor Question [Re: ruderunner] #1791440 03/29/15 09:35 PM 03/29/15 09:35 PM
Joined: May 2004 Posts: 433 St.Clairsville Ohio EV2RUNNER OP mopar
EV2RUNNER OP mopar Joined: May 2004 Posts: 433 St.Clairsville Ohio	Its a Petronix Switch and Trigger, Its a mechanical advance distributor. My thinking is that the hall effect switch should have - signal when the magnetic spot on the collar is lined up with the spot on the sensor. As I said above no matter what distance I hold the magnetic collar from the sensor, it still has no ground output..

Re: Hall Effect Sensor Question [Re: EV2RUNNER] #1791441 03/29/15 09:46 PM 03/29/15 09:46 PM
Joined: Dec 2014 Posts: 5,960 ohio R ruderunner master
ruderunner master R Joined: Dec 2014 Posts: 5,960 ohio	I've heard of lots of failures of those units. Angry white pureblood male

Re: Hall Effect Sensor Question [Re: EV2RUNNER] #1791442 03/29/15 09:56 PM 03/29/15 09:56 PM
Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN... N NITROUSN I Live Here
NITROUSN I Live Here N Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN...	I thought the sensor created an A/C signal.

Re: Hall Effect Sensor Question [Re: NITROUSN] #1791443 03/29/15 10:15 PM 03/29/15 10:15 PM
Joined: Jan 2003 Posts: 17,926 Akron, Ohio ProSport I Live Here
ProSport I Live Here Joined: Jan 2003 Posts: 17,926 Akron, Ohio	Great, I just installed a Pertronix IgnitorIII in my 72 Duster, everything I read said they are very reliable.

Re: Hall Effect Sensor Question [Re: ProSport] #1791444 03/29/15 10:30 PM 03/29/15 10:30 PM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	Usually you read the hall effect sensor signal for testing with an ossiloscope. I don't know there another way or not.

Re: Hall Effect Sensor Question [Re: ProSport] #1791445 03/29/15 11:15 PM 03/29/15 11:15 PM
Joined: Jan 2003 Posts: 10,766 Central Valley, CA. Quicksilver440 I Live Here
Quicksilver440 I Live Here Joined: Jan 2003 Posts: 10,766 Central Valley, CA.	Usually you read the hall effect sensor signal for testing with an ossiloscope. I don't know if there is another way or not.

Re: Hall Effect Sensor Question [Re: Quicksilver440] #1791446 03/29/15 11:27 PM 03/29/15 11:27 PM
Joined: May 2004 Posts: 433 St.Clairsville Ohio EV2RUNNER OP mopar
EV2RUNNER OP mopar Joined: May 2004 Posts: 433 St.Clairsville Ohio	Maybe my thinking is incorrect on it. The wiring is very simple, it has a hot from the ignition switch to the pos.on the coil then down to the "Hot" wire on the hall effect/ignition unit inside the distributor. The ground wire from the unit goes back up to the Neg side of the coil. That's why I figured that the unit completed the ground in order to fire the coil.

Re: Hall Effect Sensor Question [Re: EV2RUNNER] #1791447 03/29/15 11:43 PM 03/29/15 11:43 PM
Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN... N NITROUSN I Live Here
NITROUSN I Live Here N Joined: Jan 2003 Posts: 18,428 UPPER MICHIGAN, MARQUETTE COUN...	Quote: Maybe my thinking is incorrect on it. The wiring is very simple, it has a hot from the ignition switch to the pos.on the coil then down to the "Hot" wire on the hall effect/ignition unit inside the distributor. The ground wire from the unit goes back up to the Neg side of the coil. That's why I figured that the unit completed the ground in order to fire the coil. The unit you have is also a processor of some type. The sensor is part of it. You most likely are on the right track. Pertronixs should have a way to diagnose the problem. Some coils don't work correctly with the Pertronixs ignitions.

Re: Hall Effect Sensor Question [Re: NITROUSN] #1791448 03/30/15 02:07 AM 03/30/15 02:07 AM
Joined: May 2004 Posts: 433 St.Clairsville Ohio EV2RUNNER OP mopar
EV2RUNNER OP mopar Joined: May 2004 Posts: 433 St.Clairsville Ohio	Quote: The unit you have is also a processor of some type. The sensor is part of it. You most likely are on the right track. Pertronixs should have a way to diagnose the problem. Some coils don't work correctly with the Pertronixs ignitions. Hmm maybe he burnt the Pertronix unit up by Using an MSD Coil.. He is going to call them in the morning. Thanks for the advice guys!

Re: Hall Effect Sensor Question [Re: EV2RUNNER] #1791449 03/30/15 06:20 PM 03/30/15 06:20 PM
Joined: Oct 2007 Posts: 3,910 Oregon hooziewhatsit master
hooziewhatsit master Joined: Oct 2007 Posts: 3,910 Oregon	AFAIK, the pertonix has brains inside to change the dwell angle based on rpm. So just tapping it to a magnet will probably not make it send the signal to the coil. But yes, if it was just a 'dumb' hall effect sensor, then you should be able to tap it, assuming you have an external pullup on the signal If you ever find yourself in a fair fight, your tactics suck.

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