Where are the gounds?? Voltage Spike!!

[lightman02]

Well here it goes, I had a bad alternator I had it rebuilt and istalled it. I was getting over 16 volts out of the rebuilt one. I put in a new alternator and was getting the 14.5 which is normal. However it then shot back up to 16 volts for a few seconds and then went back to normal and has been fine for the last two days only daytime driving. I took the car out for the first time at night since the new alternator was installed and I saw the cluster get real bright for a second (high voltage) and give me a tail lamp warning. The warning went away on it's own and I did a status check and everyting was fine. So it seems like I got a voltage spike so I'm thinking there is still an issue and I don't think it's the alternator. So my question is where are all the grounds on a 02 V8 LS besides the main battery one. I think I must have a short somewhere for this to be happening. Has anyone ever seen anything like this. The battery light is off and status shows that charging system is normal.

 

[Quik LS]

there are 19 pages of ground dstribution schematics in the manual.... there is a lot of points to review. I do not know of a common one - other than the actual battery-to-chassis ground connector that is prone to loosening.

 

[lightman02]

there are 19 pages of ground dstribution schematics in the manual.... there is a lot of points to review. I do not know of a common one - other than the actual battery-to-chassis ground connector that is prone to loosening.

Anyone have the schematics they can sent me??

 

[lightman02]

Anyone have the schematics they can sent me??

Anyone?? I noticed that I get the tail light out problem only at night, and last night I got a left turn lamp out reading but as soon as I activated the working turn lamp the error went away. So far I seem to have these issues when the lights are on. So maybee I'm gettin closer??

 

[joegr]

Sorry, I don't have gen I schematics.
I would be more suspicious of the voltage feedback wire to the alternator than the grounds (although it could be the grounds). This should be a red wire to the alternator on the three pin connector.