Camoray88

Few days ago I noticed the battery light and e-light come on the dash while piddling around the yard. Checked everything out and noticed the main lead going from my battery to fuse block under the hook was hot. With a quick voltage check I’m getting 18v while running to the battery (obviously not good). Any ideas on what could cause this?

Robert m

iTrader: (2)

Voltage regulator in the alternator is bad. Had this happen to me and it cooked the main power wire and never blew any fuses

scope103

The White wire (Sense) on the 3 terminal connector to the alternator should be at battery voltage key-on or key-off. If that wire opens, the regulator will keep fruitlessly raising the voltage to get the sense voltage to come up.

So the first thing I'd do is back probe the white wire and check voltage to ground (and wiggle the wire to be sure).

If you have battery voltage at the white wire, my next guess is a failed regulator. Unexplainably, the regulator alone is about twice the price of the whole alternator at RockAuto. So before I bought anything, I'd take the alternator to a local parts store to have it tested (usually free). Get the price of a replacement alternator first; the whole reason they do [free] testing is so you'll buy your replacement right there. Then you'll know how much you can pay for the one-stop convenience.

Camoray88

Appreciate the info man, chased down that white wire and sure enough it had a break it in. Voltage is back down

scope103

Thanks for the report. Glad you could fix it.

FrederickJunkins

Thanks for sharing it, you made my day.