UNSUREBOATGUY
Petty Officer 2nd Class
- Joined
- Sep 14, 2009
- Messages
- 117
1987 Mercruiser 3.0 Alpha 1
Just picked up a new alternator for the boat. Its a Sierra 18-5951 3 wire alternator. My question has to do with how to wire it up to the engine. The Orange and black wires are self explainatory, but which wires do I hook up to the red/purple and purple wires coming from the engine harness? The alternator has a black wire and a red wire.
Do I assume that the red wire is colored correctly and that the black wire on the new alternator would have been white on the original? (I never saw the original-I'm replacing an automotive alternator, and I have my doubts whether it was hooked up properly.)
I looked at the manual, but it is still unclear to me. Maybe I just looked in the wrong spot. I looked at section 4C in Manual #10.
Thanks a bunch!
Just picked up a new alternator for the boat. Its a Sierra 18-5951 3 wire alternator. My question has to do with how to wire it up to the engine. The Orange and black wires are self explainatory, but which wires do I hook up to the red/purple and purple wires coming from the engine harness? The alternator has a black wire and a red wire.
Do I assume that the red wire is colored correctly and that the black wire on the new alternator would have been white on the original? (I never saw the original-I'm replacing an automotive alternator, and I have my doubts whether it was hooked up properly.)
I looked at the manual, but it is still unclear to me. Maybe I just looked in the wrong spot. I looked at section 4C in Manual #10.
Thanks a bunch!