Flickering Gen 1 light

mudman

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OK here it is.... just back from a ride in the 1028, Gen 1 light flickers at an idel...And gets brighter as you rev the motor... and sometimes it is not on at all. I just tightned the belt this morning. All wiring looks good and clean. Any suggestions??
 

K9Vic

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Make sure all the posts, wires and connections are tight, I had the positive post fall out and had the same issues with the flickering light. Make sure you are careful or disconnect the batteries when checking this. It cost me $10 to get the post fixed at my alternator shop.
 

kassim503

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Mine used to do this- it got worse until the light stayed on all the time and eventually stopped charging. I opted to have the entire unit rebuilt- worked well since
 

isaacucv

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Another thing to consider, check your heater fuse. If its corroded, or a cheap (harbor freight) fuse it can make the gen1 light come on even though the heater is working.
 

K9Vic

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Another thing to consider, check your heater fuse. If its corroded, or a cheap (harbor freight) fuse it can make the gen1 light come on even though the heater is working.
Really, so my thoughts of not buying their fuses in fear that they may be really cheap is true. Unlike many of their tools that I have had good luck with I never wanted to trust the fuses.

Sorry to swing off topic slightly, but that is one item at Harbor Freight I would not use, the auto fuses
 

isaacucv

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Really, so my thoughts of not buying their fuses in fear that they may be really cheap is true. Unlike many of their tools that I have had good luck with I never wanted to trust the fuses.

Sorry to swing off topic slightly, but that is one item at Harbor Freight I would not use, the auto fuses
Yea, they're junk. I had 2 melt the yellow plastic off completely but the fuse didn't blow. I only knew there was a problem because I could smell it burning. The heater still worked fine. I replaced that one and any others with quality fuses.
 

Warthog

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OK here it is.... just back from a ride in the 1028, Gen 1 light flickers at an idel...And gets brighter as you rev the motor... and sometimes it is not on at all. I just tightned the belt this morning. All wiring looks good and clean. Any suggestions??
Time for an anternator rebuild.

Usually it is the diode-trio or the rectifier that needs replacing. Some times the voltage regulator.

For ~$45 you can get the entire kit from an electrical parts house

Wholesale Alternator Parts - Starter Parts - Alternator & Starter Repair kits - DELCO 27SI HEAVY DUTY REPAIR KIT

or 1stSarge at CUCV Electric has a more complete kit. (he is a member here)

www.cucvelectric.com
 

mudman

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Hey guys thanks so much for the info. I will check the fuse, but will do the rebuild anyway as I have no idea how old the alt's are. I have bought stuff from CUCV Electric and he has treated me fair & square, so that is where I'm headed now.

"Keep Your Powder Dry"

Ken Uber
 

2deuce

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While this is an old post, the advice is still good, and the last post from Warthog is particularly spot on. I've had quite a few CUCV's and if your light is flickering or you notice at night one of the gen lights has a dull glow, the alternator is on it's last legs. I've thought about why I've gone thru so many alternators, even on very low mile trucks it happens, and I think it is because of their age and lack of use. If you decide to rebuild it yourself you will probably notice dust and corrosion in there and I think that is more of the problem than being worn out.
 
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