Pre 84 Trucks 1st gen pickups

3 wire alternator question

Old 05-18-2019, 09:57 PM
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3 wire alternator question

To start things off i am aware that there has been many write ups on this topic

Things I understand and are doing
1. using a gm alternator bracket (trail gear)
2. Powermaster 150amp alternator #47294
3. wiring
- #1 to light
- #2 to sense
- B straight to battery (with a inline 175amp fuse) using 4 gauge wire


So my questions are ;

Following people plans show that the 3 wire that go into the back of the OEM alternator are red, white, and yellow................ My wires are colored green, Black (maybe blue?), and yellow
How do I wire this? Which color is the "light wire", which is the "sense"?

Final Question ;

how can I remove the external voltage regulator from the drivers side fenderwell along with some extra wires ? Really want too clean up the engine bay and messy wiring so how did y'all go about doing this ?
Old 06-03-2019, 02:09 PM
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update : turns out that the power master 150amp doesn't fit with the trail gear bracket ...............

Anyone with suggestions ? lol

Prolly will just end up extending the lower bracket a couple of inches until the pulley on the alternator lines up with the engine pulley
Old 06-05-2019, 11:06 AM
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What year is it?

That way you can probably look at a wiring diagram and figure out what wire goes where?

Also, did you try this bracket?
https://www.summitracing.com/parts/t...t/applications
Old 06-05-2019, 12:53 PM
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thanks for the response. My truck is a 1982 4x4. Also I ordered the bracket kit from trail gears website
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