Re: Alternator wire question
Probably over simplifying, but....
Alternators have a means of sensing voltage so that the voltage regulator can adjust output voltage to its set-point, usually about 14.2 volts
The farther electicity travels in the elec system, the more voltage drops when compared to the source. Thinner wire also drops more voltage compared to thicker wire. (8ga wire is thicker than 10 ga, and so forth)
A 1 wire alternator senses voltage internally (at the alternator) - the highest voltage the entire system will see is at the big stud on the back of the alternator.
The factory 3 wire system senses voltage real close to the horn relay, which is more centrally located in the system, as a result the entire system will see more voltage compared to the 1 wire.
The horn relay is a major junction, and is the best place to get power for high-draw accessories if you have a 3 wire system. In your case, with a 1 wire and the battery a foot away, the battery (or back of the alternator) is a better choice due to higher voltage there.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.