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Username Post: Complete Sudden Electrical Power Failure        (Topic#343526)
NoMoreMrNiceGuy 
Forum Newbie
Posts: 2

Reg: 03-24-17
03-24-17 08:36 AM - Post#2683072    

I recently acquired this 1989 caprice classic with only 85k original miles. Garage kept and 1 owner it's whole life. Great shape and runs good, or it did run good until today.

Today I started it and after idling about 5 minutes it just died. There is no electrical power to anything now. I checked the 30a circuit breaker on the fuse block with my ohm meter and it is OK. I don't know the location of any other large breakers or fuses. Any ideas on what else to check or where other main fuses/breakers are located? TIA



 




junkman104 
Frequent Contributor
Posts: 1515
junkman104
Age: 61
Loc: Murphy N.C.
Reg: 01-25-14
03-25-17 05:04 AM - Post#2683180    
    In response to NoMoreMrNiceGuy

There is at least one fuse-able link on the starter. It attaches to the big post of the starter along with the positive battery cable.



 
NoMoreMrNiceGuy 
Forum Newbie
Posts: 2

Reg: 03-24-17
03-25-17 07:48 AM - Post#2683197    
    In response to junkman104

Thanks for the reply junkman. Would a failed link on the starter cause all electronics to be out? I don't have any electronics, horn, radio, starter, lights, nothing. I have the original GM service manual and the schematic shows some fusible links, but I can't find where they are located on the car. Would that be one on the starter? Odd place for a link that controls everything.



Edited by NoMoreMrNiceGuy on 03-25-17 07:49 AM. Reason for edit: No reason given.

 
junkman104 
Frequent Contributor
Posts: 1515
junkman104
Age: 61
Loc: Murphy N.C.
Reg: 01-25-14
03-25-17 04:20 PM - Post#2683273    
    In response to NoMoreMrNiceGuy

GM has used them for years back then, that's where they are.



 
Maynard G. Krebs 
Poster
Posts: 7

Reg: 02-21-19
02-21-19 03:36 PM - Post#2760431    
    In response to NoMoreMrNiceGuy

My bet is the grounded, negative battery cable has gone bad --- got so corroded that it broke and fell off! However, another possibility is that this cable has become very corroded under the rubber coating: it will LOOK okay, but it could be so corroded that it's almost like it didn't exist! Low electrical resistance in battery cables are essential to good running... and starting, esp. in low temperatures.

Look for where the battery is grounded to the engine block. Follow this wire.. toward the battery. You might find that it's broken.. or corroded. If it is, replace it with a new one... preferably with one of slightly thicker gauge than stock.

All this analysis assumes that the battery is still good. They can fail.. without warning.

I agree with a previous poster here: it COULD be a "fusible link"... that went bad when the car stalled on you and would not re-start. Identify the wires from the starter toward wherever. When a convenient point becomes available, temporarily run a wire from that point to the same point on the starter. If the car suddenly functions okay, then the wire you "jumped" is the bad one. Most of these, if not all, will be fairly thick... 'cause starters draw lots of current. Be careful that you don't get burned. If you can, wear a fairly-thick glove or two.



Edited by Maynard G. Krebs on 04-21-19 02:46 PM. Reason for edit: No reason given.

 




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