Caboobaroo Posted September 16, 2004 Share Posted September 16, 2004 Ok so I was having some problems with the Brat a week ago with the brake light and the charge light coming on. It would run for about 20 seconds GREAT but then it would start to die and the lights would go off and then it would completley die. So I finally got it running without the lights coming on and the other night I was pulling into Taco Bell to get some food and it did it again. Now I can't get it going without the lights off because it runs for about 20 seconds and then it dies. What the hell is going on??? Is it the alternator going bad because I have a theory about the fuel pump being driven off of the ignition while its cranking and then when it starts, it runs off of the field windings, field is dead so the fuel pump quits working so then it drains the bowl. Is this right? I do have another alternator but the brushes are broken in it and so I could use both of them for parts and make one good one but I also have this feeling the VR might be bad as well..... Help? Quote Link to comment Share on other sites More sharing options...
Turbone Posted September 16, 2004 Share Posted September 16, 2004 Go to the JY and get another alt Quote Link to comment Share on other sites More sharing options...
Caboobaroo Posted September 16, 2004 Author Share Posted September 16, 2004 ehh moving to Wyoming = no money. EVen to FIND one in a wrecking yard is kinda rare and I don't have the time to go shopping around since I still have a bunch to pack so I'm just gonna see if the alternator is bad and if it is, I'm gonna rebuild it with my other alternator. If its not bad, I'll swap my VR out with the other one... Quote Link to comment Share on other sites More sharing options...
TomRhere Posted September 17, 2004 Share Posted September 17, 2004 http://www.ultimatesubaru.org/forum/showthread.php?t=21396 Link is to posting I wrote on how to swap the rear covers on the alts. This is assuming that atleast one of them has good VR and brushes in it, and the other has good windings. Quote Link to comment Share on other sites More sharing options...
Seahag1978 Posted September 17, 2004 Share Posted September 17, 2004 From personal experience, I found your theory to be fact I have an external VR on my '78, I found the VR to be good. Changing the alternator cured mine. Starts without touching the gas, and stays running... one problem solved. Quote Link to comment Share on other sites More sharing options...
gbianchi Posted September 18, 2004 Share Posted September 18, 2004 my 79brat did that same exact thing swapped VR off my 80brat and wa la no problems on either one for the last 6months, go figure Quote Link to comment Share on other sites More sharing options...
rubuild Posted September 18, 2004 Share Posted September 18, 2004 If I recall, that year has 3 inline fuses (not in the fuse box). One on a white/red wire for the regulator/ alt, one for the fuel pump. I've seen broken fuses (not blown) make an on again/off again contact. kerry/roo-builders Quote Link to comment Share on other sites More sharing options...
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