Alternator wiring diagram 1991 regal - 1991 Buick Regal

Does it stop charging or the light just comes on/gauge goes down? Plug it in and check if the alternator is putting out 13+ volts. It could be a short in the cluster or the wire from the alternator.

The two fusible links on G.M. cars used to be behind the alternator. A heavy (appx. 10 gauge) wire on the alternator had a fusible link a couple of inches back from the bolt. Pull on wire to see if the link is burned out. The other link was attached to the starter soleniod . Same test.

Here's a link to your charging system,it shows a fusible link inline with alternator,follow wiring leaving your positive side of battery,link could be melted or burnt.

Hello james197260,

Below are wiring diagrams, hope they help.




Regards,
netvan

On this website you find fuse box diagram and description for Buick Regal (1988 - 1993)


Buick Regal mk3 Third Generation 1988 1993 fuse box diagram Auto Genius

There is no wiring diagram for the charging system, unless you're talking about the regulator inside the alternator. The battery connects directly to the alternator, and that's the only wire involved. If the regulator fails, you have to replace the alternator.

bypass the factory amplifier you will not need it unless your deaf

sounds like your alternator could be givin up slowly, have a charging test done and after a full charge on the battery have it tested as well.

The gauges fuse under the dash powers the idiot lights and gauges.If they are working, you need to check the fusible links.Disconnect the battery then look at the starter.The terminal that the heavy battery cable bolts to also has 2-3 other wires bolted to it give each wire a moderate pull,if any stretches easily the link is burnt.When a large short occurs the link will burn out but the insulation usually still looks fine.Make sure to replace it with the same size fusible wire.

are you talking about the pvc valve it is in front of the intake have to twist it to unlock it is under there take a pair of needlenose pliers to get it out