charging issues...

[ohfisherman]

86 m1008. rear battery not charging. i had passenger alternator bench tested and came back good. reinstalled and still not showing a charge at the battery. i changed the lightbulb too and still no help. fuses look good too. am i missing a fusible link or something? will the alternator still excite with a battery that has a low charge? last night the rear voltage was only at about 9 volts when i checked it. i know it needs a full charge but i should still be getting voltage from the alternator, right? btw both batteries were new 4 months ago...

 

[Warthog]

has the GEN2 light come on at all? How about the voltmeter?

Have you checked the very bottom fuse?

 

[ohfisherman]

gen2 light not on at all. checked fuses but i think i am just gonna replace them all. do you know which fuse controls that alternator? truck has 18,000 original miles and has always given me problems. my other 2 are well over 100k and run great...

 

[Warthog]

gen2 light not on at all. checked fuses but i think i am just gonna replace them all. do you know which fuse controls that alternator? truck has 18,000 original miles and has always given me problems. my other 2 are well over 100k and run great...

The very bottom fuse.

If the GEN2 light never lights, the alternator will never work.

 

[mistaken1]

Off topic warning

..... truck has 18,000 original miles and has always given me problems. my other 2 are well over 100k and run great...

It is my belief that most low miles / low hours items surplussed out are low miles / low hours precisely because they have issues.

Most not all, there are always exceptions.

I now return you to your regularly scheduled lack of power to the gen 2 lamp.

 

[ohfisherman]

alright after spending a few more hours looking at anything related to my problem i saw a mention of a relay for the gen2. any ideas on where it is or what it looks like?

 

[Warthog]

It is next to the starter relay and the voltmeter relay.