Phoenix area guru for electrical problems?

Brendan Courtney

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Anyone in the PHX area know of a good trouble shooter for electrical issues? Been struggling with voltage (no it's not the alt) issues. I can see it in the SCT X4 that voltage is erratic across battery voltage, volts across injectors, etc. I've heard of some places for typical cars but not for Terminators.

Thanks
 

cschoening09

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My 01 gt a few years back would have alternator go bad once a year . I opted for a lifetime warranty one and just replaced it every fall lol. Not sure why these cars eat alternators
 

SVT Hess

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Have you checked what voltage the ecm is getting at the ecm? I’m wanting to say there was 3 inputs if memory serves. Then again I’d also double check to see what the alternator is putting out at the alternator just to help eliminate it being a possible culprit since multiple things are affected.
 

Brendan Courtney

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Have you checked what voltage the ecm is getting at the ecm? I’m wanting to say there was 3 inputs if memory serves. Then again I’d also double check to see what the alternator is putting out at the alternator just to help eliminate it being a possible culprit since multiple things are affected.
It’s weird, at idle the alt isn’t putting out the 14v it should be, more like 12-12.5 if I tip in the gas a little it brings the colts up to where they should be. However, at WOT the voltage is falling out....
 

Brendan Courtney

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A capture of voltage before problem and current state. Second one is voltage fallout at WOT
 

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Brendan Courtney

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Have you checked what voltage the ecm is getting at the ecm? I’m wanting to say there was 3 inputs if memory serves. Then again I’d also double check to see what the alternator is putting out at the alternator just to help eliminate it being a possible culprit since multiple things are affected.
I have not checked the ECM but I will look into it.
 

01yellercobra

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It’s weird, at idle the alt isn’t putting out the 14v it should be, more like 12-12.5 if I tip in the gas a little it brings the colts up to where they should be. However, at WOT the voltage is falling out....

That sounds like a regulator problem. I'd contact J2.
 

c6zhombre

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Sounds like the exciter wire......when you go key on, but before you fire the car.....you had better see the battery light on the dash. If you don't, when you do fire...the voltage will stay low until you blip the throttle past 2500-3000 then it most likely will start outputting good voltage. Double check the harness.....separate it and then reclick it back into position with a solid click. If that doesn't do the trick, time to send it back
 

Brendan Courtney

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Sounds like the exciter wire......when you go key on, but before you fire the car.....you had better see the battery light on the dash. If you don't, when you do fire...the voltage will stay low until you blip the throttle past 2500-3000 then it most likely will start outputting good voltage. Double check the harness.....separate it and then reclick it back into position with a solid click. If that doesn't do the trick, time to send it back
That sounds more like it! Reclick which connector? At the alt it at the fuse coupler? I’ll check for the battery light when I get home.
 

c6zhombre

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That sounds more like it! Reclick which connector? At the alt it at the fuse coupler? I’ll check for the battery light when I get home.

The harness at the alt.

Good luck with it. Hopefully you get home, don't have the battery dash light.....then reclick that harness and you do! Easy fix
 

*Jay*

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This honestly sounds like a bad alternator, will dig into the service manual some tomorrow and hopefully come back with something constructive.
 

*Jay*

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Straight out of the manual, start here and read everything before starting. Do you have a multimeter??? Sounds like the "A" circuit, have you had the alternator and battery tested yet??? That may be the easy first step.
 

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Brendan Courtney

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Straight out of the manual, start here and read everything before starting. Do you have a multimeter??? Sounds like the "A" circuit, have you had the alternator and battery tested yet??? That may be the easy first step.
Thanks Jay, I’ve had the alt and battery tested, both were bad at one time or another. Battery is new, Autozone, and it’s a new alternator J2Fab. I think something is causing them to fail. Let me try out what you have posted and I will update the thread. I have a DMM, thanks for your help!
 

*Jay*

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I was in the same prediciment with a Mechman Alt and new battery. I had issues with that "A" circuit, no feedback going back. It was the battery light and key positions not matching that helped me ID my issue.
 

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