Mechanics

BATTERY WILL NOT CHARGE

1989 Dodge Colt • 108,000 miles

I have a 1989 1.5l Colt, Battery will not charge. I have 15.5 volts coming off the Alternator but I only see 11.75 Volts on Battery when car is running. I think it could be voltage regulator but don't have any wiring schematic to know. Any help appreciated, Thanks.
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Z7one
September 27, 2012.




Where are you measuring 15.5 volts at the alterator?


Saturntech9
Sep 28, 2012.
I measured the voltage from the white large wire at alternator.

There are 2 other small wires, blue and yellow which I did not measure, I figured those went to instrument cluster, etc.


Tiny
Z7one
Sep 28, 2012.
Engine off key on you should have battery voltage at the two white wires with a red stripe and the red wire to the alternator?The white wire goes to the gauge.


Saturntech9
Sep 28, 2012.
The two white wires go to the same lug and it has 12.45 volts. I have had the battery on charge so it is up a little from my earlier post.


Tiny
Z7one
Sep 28, 2012.
Alright does the red wire have battery voltage also?


Saturntech9
Sep 28, 2012.
I don't have a red wire. Please see attached picture.
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Tiny
Z7one
Sep 28, 2012.
Iam justing going by my wire diagram I have I would say the blue wire should have battery voltage also and the yellow wire is for the battery light.


Saturntech9
Sep 28, 2012.
12.06 on yellow wire, nothing on blue


Tiny
Z7one
Sep 28, 2012.
Do you have a colt or colt vista wagon or sedan?


Saturntech9
Sep 28, 2012.
Yes it is. Sorry I didn't mention that earlier.


Tiny
Z7one
Sep 28, 2012.

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