Newbie

[96monaco]

I have a 96 Monaco with the 8.3 engine and I have a dead tach and I’m not charging my alternator is external regulated my question is where does the alternator get power from ....the big post has no power ?

[HJLowell]

Maybe your Alternator is not charging the Batteries???
Is that what you wanted to say?

Originally Posted by 96monaco

I have a 96 Monaco with the 8.3 engine and I have a dead tach and I’m not charging my alternator is external regulated my question is where does the alternator get power from ....the big post has no power ?

[twinboat]

If you have a battery isolator, there may not be power on the big stud on the alternator.

It does need a battery signal to one of the small wires. Either to the alternator or regulator.

Is the voltage regulator on the back of alternator or mounted remotely ?

[96monaco]

Thank you twin boat mine is remote mounted and it has power to 2of the wires one key hit one hot all of the time and a ground

[twinboat]

Probably bad alternator.

If you know where the isolator is, you can jump the center to one outside terminal, while the engine is running and see if it charges.

[96monaco]

If I jump the isolator it will charge I wasn’t sure about the alternator wiring I can’t find a diagram for my alt it’s a power line thanks again for your help I appreciate it

[twinboat]

If you jump the isolator and it charges its not a bad alternator.

The isolator is a electric check valve. Power can only go in the center and out both sides. No other direction.

You have a bad isolator, easy to test, or you have a wiring problem.

The alternator output wire goes to the center tap of the isolator and each side tap goes to a battery, house/ chassis.

Remove the center wire and with a diode tester, common in most multimeters, test from center to right and center to left terminals. Red probe on center, black probe on right or left, meter should beep.
Black on center, red right or left, no beep.
If no beep either way, bad isolator.

Google testing battery isolator for best instructions.

If isolator tests good, wiring to alternator or regulator is at fault OR someone replaced the alternator with wrong one.

[96monaco]

So my big question is does anyone have a diagram of the alternator and the regulator so I can figure out where I’m supposed to power to the alternator I can’t seem to find anything about it and I don’t have the manual for this coach

[96monaco]

Ok twinboat I pulled the alternator off to clean all connections reinstalled it still no charge tested all wires there is no power going to the alternator I tested the fuses and found the the small fuse that feeds the alternator relay has no power to it now I’m struggling to find were that fuse gets power from also it will not charge if I jump the isolator any help would great