Alternator wiring 1994 Regal Commodore 272

[markg101]

I just had my Volvo 7.4 GL (actually a ChevY) rebuilt by a local mechanic due to water seapage. When re-installed the engine will now no longer stay running. (Fuel pump isn't getting power)

The Clymer's Service maual shows a wiring diagram without color coding or description. I believe the alternator wires are crossed. The diagram shows that power for the fuel pump is served from the alternator output?
Does anyone know where to find a thorough diagram for this purpose. Or, is there another place I should look for the fuel pump power problem. ( BTW-it works when 12 volts are connected directly from the battery..so the pump should be OK)

 

[Don S]

Re: Alternator wiring 1994 Regal Commodore 272

What is the full model number of your engine? The 3 or 4 letters after the 7.4GL

EXAMPLE
7.4GLPLKD
The LK in this example is the model year.

 

[Don S]

Re: Alternator wiring 1994 Regal Commodore 272

If the alternator is wired correctly, check the relay first, then check the diode (#16) in the green wire.

 

[markg101]

Re: Alternator wiring 1994 Regal Commodore 272

If the alternator is wired correctly, check the relay first, then check the diode (#16) in the green wire.

 

[markg101]

Re: Alternator wiring 1994 Regal Commodore 272

Thanks Don,

I'm checking the wiring to the alternator shortly....we checked the Diode previously...it was good. Also the relay was good-changed it anyway.

Seems like it has to be miswired....thanks-great help

 

[markg101]

Re: Alternator wiring 1994 Regal Commodore 272

Don S,

Took a break from the project and back on it.

Your diagram helped keep the fuel pump running when engine on-thanks

another isssue arose-the starter remains on when the engine is running-Do you have a similar diagram for the starter circuit as it relates to the alternator.

Also, where can I buy a good service manual for these types of issues-the Clymer's I have is a bit light

Mark

 

[Don S]

Re: Alternator wiring 1994 Regal Commodore 272

What is the full model number of your engine? The 3 or 4 letters after the 7.4GL

EXAMPLE
7.4GLPLKD
The LK in this example is the model year.

Need this info to get you the proper info for which manuals you need.