Bad voltage regulator?

[Airslot]

Anybody on this site have a bad voltage regulator? I remember that I was going to look up a few tests for somebody right after New Years, but I forgot. How ya doin Hammer ;D

Airslot

[msbhammer]

Yo Air, Waiting for the overtime check to come in, before I check out and replace my volt reg. Been seeing low prices and totally off the wall prices on the volt reg. Hopefully within a few weeks I'll get her done.

[Airslot]

OK my man. If you need a hand testing to make sure your swapping out the right part, just shout reeeeel loud. ;D

Airslot

[76GMC1500]

Does your alternator have 1 wire or 3 wires to it? If it's a 3 wire, you need to find which one is for excitation voltage. Hook a volt meter up to the main outlet wire and start the engine. Connect 12volts from the battery to the excitation lead and if your voltage jumps to 14-18v+, your voltage regulator is bad. If the voltage stays the same, something else in the alternator is bad.

[Airslot]

GMC - He's got a 200 merc w/ the reg built into the rectifier. 5 wire deal I believe.

Airslot

[steplift20]

what kind of motor do you have i have a 1988 150 merc o b and there is a rectifier and voltage regulator the rectifier is cheap about 35 dollars the voltage is more money but i would check the wires on the voltage regulator first and clean them they could be corrodid

[Airslot]

Answering for Hammer, he's got an 86' 200 Merc. I've got the same 88 Merc 150 as you do.

Airslot

[Skools Out]

GMC everything isn't a GM motor lol

Hammer post a pic of your regulator i may have one.

[steplift20]

check the conections on the voltage regilator is mounted on the top of the motor with a couple of wires clean the terminals and check to see if there corroded you might have to change it and the rectifier also
then you should be good to go