Thread: Electical help required

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Hello Guys I have got a problem that needs tech input.

I am in the UK and I have got a 57 truck. The motor is a Gen6 Big block with RamJet injection.

The alternator is a chrome single wire job an I am gettin no output from it.

There is a connector on the side with the two standard blades going to the regulator but it had been plugged with factory rubber seal. I looks like the stator windings have been cooked.

My questions are:-

1) Can anyone identify the alternator?

2) Can you get a repair kit?

3) Can single wire alternator be converted to a 3 wire alternator by removing the plug and connecting to the terminals

Any help will be greatly appreciated.

Looks like just the common GM alternator case, looks the same as the 80's Chevy's came out with.... Stator doesn't look good at all, might be best to just get a new alternator then either polish that case or switch the new innards to the polished case on the old alternator. Then just remove the plug and your alternator will be the standard 3 wire GM alternator....

Welcome to CHR, very good looking truck!!!!

Originally Posted by Dave Severson

Looks like just the common GM alternator case, looks the same as the 80's Chevy's came out with.... Stator doesn't look good at all, might be best to just get a new alternator then either polish that case or switch the new innards to the polished case on the old alternator. Then just remove the plug and your alternator will be the standard 3 wire GM alternator....

Welcome to CHR, very good looking truck!!!!

Thanks... can you recommend a part number and vendor. Its hard to find the stuff in the UK. I would like to rebuild if possible. Its got a billet front half and pullys. Looks expensive to replace.

You're welcome! Here's the start of the listings at Summit, don't know how expensive it is to ship stuff over there. You might also want to check with Roadster 32 (Steve) here on CHR...He's from the UK also and may know of some other sources that shipping wouldn't be such a rip off!!!!!

1983 - CHEVROLET - Alternators and Generators - Ignitions & Electrical - SummitRacing.com

They are underr $100. on ebay

Onewire alt. don't go to regulator - it is just one wire and it goes to 'alt' wire in the harness for the 502. It won't give any output volyage until you wing the motor to above 2500rpm. And you don't run a wire to the indicator lamp on the dash. The insides looks pretty normal to me, i'd put it back together and on a motor and lite off the motor and check for voltage - no wireing to the altenator, just look for voltage on that stud.

Thanks for your help guys. I stripped it and found the rectifier pack was burned out as well. I bypassed the rectified and I could only get a couple of volts AC out of it so the stator is goosed. You put me on the right track regarding the GM part I think I have found an 80s delco alternator that has the same internals that I can swap over. Just got the brakes sorted out now. Its tough not being able to go the the wreckers for parts.