Alternator Install - blue/yellow connections - Team Camaro Tech
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post #1 of 4 (permalink) Old Oct 13th, 07, 07:49 PM Thread Starter
 
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Alternator Install - blue/yellow connections

I just replaced my alternator. Question on the connection of the blue/yellow.

History, of problem.

Battery was not charging. before swap.
Also had some problems starting in summer that i assumed was heat soak given what was going on and the fact the car started when things cooled down.
Gen light on at start until reved up to running rpms. (recent problem with last month or so)
Volt meter showed no increase in volts at idle/higher rpms.

So:
Replaced alternator.
Old alternator had the RF post marked R being closed to the battery terminal and the F near the ground post. Blue was connected to the R side.

New alternator does not have the post marked. But I connect in the same way from just the old visual, the gen light stays on. When i reverse the connection, gen light goes off. Charge on Volt meter was 12.8 at idle and did not go over 14 V until reved up to 2000 rpm or greater.

I took the car back to Kragen for thier test and the New alternator failed thier test.

So. sorry for the long winded post, but should the blue wire connection go closest to the Bat side post of the new alternator? Any help appreciated.

Thanks.
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post #2 of 4 (permalink) Old Oct 14th, 07, 11:20 AM
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Re: Alternator Install - blue/yellow connections

Blue wire to F terminal, furthest from BAT terminal.

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post #3 of 4 (permalink) Old Oct 14th, 07, 07:25 PM Thread Starter
 
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Re: Alternator Install - blue/yellow connections

Thanks. This was very helpful. I think the ultimate problem was a bad voltage regulator. After I replaced that and hooked this up per above to the new alternator, it tested out fine. Thanks for the help!
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post #4 of 4 (permalink) Old Oct 15th, 07, 05:21 AM
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Re: Alternator Install - blue/yellow connections

You're welcome. Yes, good charging voltage usually doesn't appear until after 1800 rpm, 13.5 volts.

Don't throw away the old regulator. It can be freshed up. Remove the cover, polish the contact points with emery paper, and readjust the voltage setting, if needed.

Nothing lower than 13.5 at idle, no load, ign only, to 14.8 volts at 3500 rpm, no load. With lights on, heater on, and wipers on, 13.2 volts at idle. Battery helps in providing the current needed at low rpm, higher rpm, alt recharges the battery. It never ends. You could replace the mechanical regulator for an electronic next time, Wells VR715.

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