Question about 1992 GMC Jimmy

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Need help with auto wiring ( DON'T KNOW WHERE WIRES GO? )

STREETROD- putting a ' 92 s-10 jimmy alternator on B.B.C. with aftermarket HEI ignition from ~ 80s. where do wires go ?

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  • metalsguy Jun 05, 2008

    one wire not required

  • metalsguy Jun 05, 2008

    THIS IS A STREETROD SO THERE IS NO ALT. LIGHT. THE ALT. HAS 3 WIRE CONNECTOR.THE SYSTEM IS NOT WIRED YET AS WELL.

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  • Master
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Located the wire coming from batterie light thats very easy you just have to aply groun to one of the 2 wire conector and the alternator light will come on with ignition on, be carrefull the other will have 12 volts, then the big and thick wire goes to the big post on the alternator, and the batterie light wire goes to the remainig small alternator wire, i belive must to be brown color
on alternator but can't remeber, good luck

Posted on Jun 05, 2008

  • fernando arevalo Jun 05, 2008

    i need the part number for the alternator or send a picture of it and will tell you from there

  • fernando arevalo Jun 08, 2008

    if you still having problems send me a picture of alternator to fernandoa999@aol.com and we go from there. thank you

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1 Answer

1955 olds 88 hei ignition wiring to key and ignition system


Original system has a resistor wire between coil + and ignition key, to reduce voltage and thus increase amps to give fatter spark and increase fuel mileage. For HEI system, this resistor wire must not be used, so run new primary wire straight from switch "run" to coil +. There should already be a wire from the starter solenoid to the coil + to supply full 12 volts when cranking to give higher voltage spark to plugs to help jump the gap better for use while starting. The MSD web site has much more info.

Jul 05, 2016 | Cars & Trucks

1 Answer

Car will not turn off with keys off and removed


This can be caused by a few different things.The first item to check would be the alternator. There may be a feedback to the ignition switch from the voltage regulator field exciter wire. The other scenario that we commonly see is feedback from an aftermarket ignition system that utilizes an internal relay, or both a battery and ignition source to power the system. These are fairly common problems that people experience when using many aftermarket-wiring systems. Generally, an OEM harness will not have the problem of alternator "run-on", as there is usually a resistance wire in the dash harness to keep this from happening. Solution: To figure out where the problem exists, start the car and with the key in the ON position and the car running, turn off the key. With the ignition turned off and the car continuing to run, simply remove the plug from the alternator (DO NOT TRY AND REMOVE THE BATTERY POWER WIRE FROM THE POWER STUD!) and the car should shut off if the alternator is creating the problem. If it does not stop running, your feedback problem is coming from something other that the alternator. If you are using an aftermarket ignition unit, check to see if there is a fix available that includes a diode to put in line on the ignition feed to keep their system from back feeding into the ignition switch. If you do not have an aftermarket ignition system in your car and it continues to run after pulling the alternator plug, you'll want to call tech support from your harness manufacturer for help. If your car does shut off when you remove your alternator plug, you may have to put a diode in line on the field exciter wire to keep the alternator from back feeding to the ignition switch. Again check with the harness manufacturer for help.

Apr 12, 2016 | Cars & Trucks

1 Answer

INSTALLING HEI IGNITION AND NEED HELP


i have no issues WITH CAPS, used to have a home computer in 70s with ASR33 printing terminal that did all caps..... all the time.
Is this a 1990 jeep? and what engine? you never stated the engine
4.2 L AMC straight-6 engine?

what distributor are you running off what engine, and what year.
is it with full mech, advance and vacuum advance , pre 1986?
the nutter bypass, 4.2L
it cuts the ECU out of spark controls.

this means ECU advance is killed, on now only the dumb
module runs advance.
the stock system had a ballast resistance wire. and the
start wire to the the coil bypasses this wire. for full coil power.
this is not used in HEI.
infact there are many HEI setups. which one. 7wire. ?

here is 7
http://www.msextra.com/doc/ms1extra/MS_Extra_Hardware_Manual_files/ew7hei.gif


if i had your rig, it upgrade it to MSD. sure would. done many.
by doing that , all the mystery of parts, that works ends.
if you need help, spec out your set up, including, schematic
and BOM, parts used, p/n of parts used.

here are 3 HEI ( 4,5,7 pin)

http://brianesser.com/tech/wiring/msd/WDTN_pn9615_Page_030.jpg

The biggest issues is spark timing curves.
getting them right for those Webers.
and standalone spark controls win here.

the right way
http://www.jegs.com/p/MSD-Ignition/MSD-Ignition-Controller-for-GM-EFI-Carbureted-LS-Engines/758329/10002/-1

You tune the spark advance for YOUR engine and setup.
not that funky stock spark box and nutter mod.

my guess, is you burned up the ballast when it hit the real
inside distributor coil primary, that is totally the wrong coil
for a ballast. I hope it dont burn up a good coil,,,,,,,
The coil and all wiring for EFI must be correct
and the bypass for starting , is useless. for that distrubutor
because it runs 12v all the time, so if the ballast did stay good
the HEI would be running way too low , at 8v. running.
and would fail.
here is a great HEI page, under dev. but is good.

http://www.crankshaftcoalition.com/wiki/Hot_rodding_the_HEI_distributor

this link above shows how to get HEI right on a carb car
but fails to show the benefits of true spark advance tuning.
Great fuel economy can be attained under light loads
with large spark advance. and then less under full load.
(no pinging too)
The spark advance , allows the flame front to start at the correct time
to take advantage of piston rod angles.... and not send unburned fuel out the exhaust.
Id put an MSD in there and tune it carefully, I would. (webers a given)_

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1 Answer

I have a 72 chevelle with a 350 ci , I put an hei distrubitor in it but now my alt wont charge and its brand new what should I do...


The HEI has nothing to do with the alternator

The HEI needs battery voltage,not the resistor,
that was there for the point ignition distributor

Unless you moved wires around to feed the HEI,
you just diagnose the alternator as usual

New doesn't mean it works
Have to know how to test it

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1 Answer

How to replace gmc1990 pickup coil


I assume this is the HEI coil. If not let me know and I can help further.
Instructions
    • 1 Put your safety first. Engage your emergency or parking brake. Also, disconnect the negative battery cable from the Chevy Corvette's battery.
    • 2 Make the ignition system visible. On older models, you may need to remove the plenum extension for the intake manifold using a screwdriver or wrench. For newer models, remove the cover for the fuel rail.
    • 3 Look for additional parts that you need to remove. For HEI systems, you need to access the distributor through the cap. Other systems use an ignition coil harness connector.
    • 4 Disconnect the secondary wires, or spark plug wires, from the ignition coil. Tag each wire with masking tape, so you know which terminal to reconnect the wire to. If you connect the wrong wires to the terminals, your Chevy Corvette won't start.
    • 5 Detach the ignition coil mounting bolts and remove the ignition coil. The amount and type of bolts vary depending on the part number for the Corvette ignition coil. You may also need to remove the ignition coil arc seal.
    • 6 Clean the distributor cap with a soft cloth. Now is a good time to replace the seal, if needed. Insert your new ignition coil and secure it in place. As you reassemble, use a Torque wrench to tighten the mounting bolts or screws to 13 inch pounds (1.5 Nm) of torque.
    • 7 Reassemble the rest of the parts and reconnect your battery. Start the Chevy Corvette to ensure the repair worked.

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1 Answer

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I dont know if this will help but my sister had 2001 envoy and had similer problem we found wiring harness next to exaust was burnt and stuck to it. we pulled it off and blacktaped wires. this fixed her car. good luck

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1 Answer

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