Can anyone confirm the color of the sense wire on the OEM alt.

[forcefed86]

I removed the plug on the alternator. Looking at the 2 wires one is yellow and 12 gauge or so and the other looks to be 16g black with a yellow stripe. I think I falsely assumed the smaller gauge wire was the sense wire (black w stripe). I clipped this wire and ran it over to the plug for the washer fluid motor. When I probed this is was roughly 2 volts under battery voltage so I figured it may be a good place to start. Plugged it in and it basically did nothing. so I jumped the same wire to the + bat terminal. Voltage jumped up from 12.9 to 14.2, then the wire got hot and I heard a pop down by the alt and it's not charging. I don't have the electrical shop manual. Can anyone confirm which wire is the sense wire? Pretty sure I tapped the wrong wire. I should have know better I was rushing through it. Although even if it was the wire that energizes the coil why would jumping battery voltage to this wire be a bad thing?

On a side note when I checked the voltage of the black and yellow striped wire with the car running it was at 15v? Yet battery voltage was only 12v? I just bought this alternator and when I unwrapped it the pulley was bent where someone had dropped it. I should have just brought it back then. But I had a spare pulley. At first start idle voltage was around 14. After it warmed up voltage was down to 13.2 or so. Turned on all my loads and it would stay around 12.9. At WOT it would drop to 12.5v/ It may have been crap to start with and I just pushed it over the edge.

thanks

 

[psiaddict]

I removed the plug on the alternator. Looking at the 2 wires one is yellow and 12 gauge or so and the other looks to be 16g black with a yellow stripe. I think I falsely assumed the smaller gauge wire was the sense wire (black w stripe). I clipped this wire and ran it over to the plug for the washer fluid motor. When I probed this is was roughly 2 volts under battery voltage so I figured it may be a good place to start. Plugged it in and it basically did nothing. so I jumped the same wire to the + bat terminal. Voltage jumped up from 12.9 to 14.2, then the wire got hot and I heard a pop down by the alt and it's not charging. I don't have the electrical shop manual. Can anyone confirm which wire is the sense wire? Pretty sure I tapped the wrong wire. I should have know better I was rushing through it. Although even if it was the wire that energizes the coil why would jumping battery voltage to this wire be a bad thing?

On a side note when I checked the voltage of the black and yellow striped wire with the car running it was at 15v? Yet battery voltage was only 12v? I just bought this alternator and when I unwrapped it the pulley was bent where someone had dropped it. I should have just brought it back then. But I had a spare pulley. At first start idle voltage was around 14. After it warmed up voltage was down to 13.2 or so. Turned on all my loads and it would stay around 12.9. At WOT it would drop to 12.5v/ It may have been crap to start with and I just pushed it over the edge.

thanks

Here is a link to the thread that has the answers to your question, I quoted the short answer here:

The later FSM says the sense is the Yellow wire to pin 1 of the alternator connector and runs to subfusible link 4.

But the full thread is below and has more info:

http://www.dsmtuners.com/forums/newbie-forum/378936-1g-alternator-voltage-sensing-wire.html


I hope this will help you sort out your problem, and there is a link for downloading the service manual at the end of the thread if you need it