Cant get my 69 to charge - Team Camaro Tech
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post #1 of 3 (permalink) Old Apr 26th, 10, 04:11 PM Thread Starter
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Join Date: Jan 2008
Location: quebec
Posts: 360
Cant get my 69 to charge

Been searching for this gremlin for the last few days.

Problem: 1969 Camaro stock charging system ( external regulator with 3 pin alternator)

Car runs on the battery, cant get the alternator to operate, installed a new alternator and voltage regulator.

I notice that red in dash charging light comes on very dim @ idle gets brighter with rpm's.

Ohm all wires and they are all o.k.

i bypassed the voltage regulator ( jumped white and orange wire) and alternator started to charge ( but goes to 16 [email protected] 2000 rpm). So i guess the alternator is good.

Could it be my new voltage regulator is defective...i tried the old voltage regulator and i get no signal to in dash light ( and still no charge).

Any help would be appreciated

p.s. i know of importance of original parts, so NO i did not give them back as a core
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post #2 of 3 (permalink) Old Apr 26th, 10, 06:08 PM
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Re: cant get my 69 to charge

Yep, you'll 'full fielded' the alternator and it proved good and if an ammeter was in series with the BAT wire from the alt, it would have shown an indication close to the stamped amperage on the alt case, I hope.

Using a voltmeter, the charge voltage on BAT terminal would be, or should be, close to 0.2 volts, across the battery posts. An, there would be charge voltage on the brown wire as this wire goes to the other side of the GEN light, ignition on the other GEN bulb side, and light would be, or should be out.

A voltage lower than charge voltage would be on the field wire indicating the field being energized for alternator to change energy from mechanical to electrical, yada, yada. Also, placing a screwdriver on the rear bearing, you would feel a magnetic field, again, dependent upon the amount of current being drawn, more current, more mag field.

I would look to see with an ohmmeter if the VR chassis is on the same ground as the alternator case. Sixty-seven's and sixty-eight's have the VR mounted on rubber well nuts and a strap from the chassis to radiator support for the ground continuity; sixty-nine's, I believe are hard mounted to the rad support. Might put a star washer between the VR cahssis to rad support to make sure of ground. After 10-15 minutes of running, the VR cover or ambient area of the VR should be hot, 130F or so.

You can always replace the mech VR with a wells unit, P/N VR 715, and transfer the cover for original look. Also need a tight belt and clean battery clamps & posts.

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post #3 of 3 (permalink) Old Apr 26th, 10, 06:53 PM Thread Starter
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Join Date: Jan 2008
Location: quebec
Posts: 360
Re: cant get my 69 to charge

i just checked my ground for ohm's, following are my results:

- side of battery terminal to VR= 0.00 ohm's
-side of battery to VR casing = 0.00 ohm's
alternator case to Vr casing = 0.10 ohm's or 0.01 ohm's (depending on where i set dial on meter)

i also temporarilly installed a wire from battery - to VR casing, same results = no charge

I will try to bring back my VR to auto parts store, as i think its defective.

Any other suggestions would be appreciated
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