atlernator wiring??
#1
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Thread Starter
atlernator wiring??
I am trying to update and old 87 supra skiboat. It had a 351 PCM but we replaced with a custom 351. The parts place shipped me the wrong alternator.
The original one had 3 wires.
-orange..positive
-black..ground
-green wire..
The new alternator is like our mercruiser ones with the 2 small gauge wires(pink and purple).
How can I wire the new alternator in? Here is a pic of the wire harness and apic of the new alternator.
The original one had 3 wires.
-orange..positive
-black..ground
-green wire..
The new alternator is like our mercruiser ones with the 2 small gauge wires(pink and purple).
How can I wire the new alternator in? Here is a pic of the wire harness and apic of the new alternator.
#3
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Thread Starter
#5
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Merc/mando 4 wire alternators are wired as follows:
Large red, post on alt to starter, supplies the output.
Black, ground, self explanatory.
Purple is the excitation wire. It's on when the key is in run. It tells the alternator to charge.
smal red, or red stripe, is sensor. This meters voltage in the circuit and compensated for loss up to the dash.
You'll need to determine if your pink wire is hot all the time (sensor), or switched (excitation). Then add the needed wire.
What type of connector do you have for the 2 small wires?
Gary
Large red, post on alt to starter, supplies the output.
Black, ground, self explanatory.
Purple is the excitation wire. It's on when the key is in run. It tells the alternator to charge.
smal red, or red stripe, is sensor. This meters voltage in the circuit and compensated for loss up to the dash.
You'll need to determine if your pink wire is hot all the time (sensor), or switched (excitation). Then add the needed wire.
What type of connector do you have for the 2 small wires?
Gary
#6
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#7
this may help you too...
http://www.arcomarine.com/xhtml/Tech...tor%20tips.pdf
http://www.arcomarine.com/xhtml/Tech...tor%20tips.pdf
__________________
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!