Gen 1 Light

[LT67]

85 M1008 factory 24V system.

When I start the truck, the light does not come on and the needle on the gage is in the green, but close to the beige . When I bring up the rpm's to around 1500 the light comes on and the needle goes halfway into the beige. I don't have a voltmeter and all connections are clean and tight. Assuming it's time for a rebuild?

 

[MarcusOReallyus]

Buy a cheap voltmeter. Less than 20 bucks at Lowes or Harbor Freight. You need one.

Then see the "Testing the alternator on the vehicle" sticky at the top of the forum.

Member Tow4 sells rebuild kits. It's not a tough job. My first time took me 45 minutes on the bench, not including R& R time. Some do it in 10 or 15 minutes, because they've done a few.

 

[LT67]

Just needed a rebuild, all is back to normal...