Here is the wiring diagram for the charging system for you.
If you have further questions on this, please feel free to reply.
Happy New Year!
How many wires are on the connector that plugs into the regulator?
Thats wierd,,,i checked another source and its showing just the brn wire...sure its a 1989?
I dont know whats up with my referance data, but thats all i have.
I will open your question up for others in the event someone has something different.
It is :-)
Wait for someone to reply
Thanks,,,that definatly helps,
In the harness going to the alternator, the brown wire is tied into the "L" terminal which is basicaly a line feed to the gauge.
The green wire is attached to the "F" terminal,,,,,it is what is called the exciter wire,,it excites the field windings in the alternator only when the key is in the "crank" position,,,this activates the windings, and also allows the vehicle to shut down when you turn the key off.
the blk/wht, i'll have to check.
In other words, if the field windings were to be continously applied with battery voltage,,,the vehicle wont turn off.
Do you have a voltmeter that we can do some circuit testing?
I think we can isolate it pretty quick if you do,,,,this is probably one of the most direct charging systems, and if you understand what i said about the field windings with the excite from the ignition switch, just let me know...i'll be happy to help.
No problem bro,,,i just didnt want to see your question hanging out there for too long..
You can continue to ask me questions as long as ya like,,,no prob here,,,it's just pretty cool that i can help people online..."The wonderful world of internet"
I'll search before and aft of '89 for the GM wiring,,,but i got to tell ya,,most all work off the same applied "excitement" to the field windings when the key is turned to the "start" position....
Remember that the field windings at the alternator are excited from a "momentary" pulse of voltage only when the key is in the crank position. once the key is released to the "run" position,,,,,,,,,,,,,,,,the field windings no longer need excitement.........and power HAS to be released from the feild windings("F"), otherwise the engine wont shut off when you turn the key off.
Keep me posted..