Put new battery in 3 wks ago has cranked fine until today. No power at all. Does it have a fuse or relay that could be out
Monday, May 18th, 2015 AT 8:50 AM
9 Replies
CARADIODOC
MECHANIC
33,864 POSTS
Have you tried a jump-start to see if something drained the battery? Have you measured the battery voltage? It will be 12.6 volts if it's fully-charged. If that's what you find, follow the smaller positive battery wire to the under-hood fuse box. Check that connection to be sure it's clean and tight.
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Monday, May 18th, 2015 AT 9:10 AM
TOYA GOTCHER
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It is clean & tight, wont take a jump either. Im trying to find out if there is a fuse or relay that controls power
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Monday, May 18th, 2015 AT 9:25 AM
CARADIODOC
MECHANIC
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Exactly which model and engine size do you have? All I can find is a Grand Marquis with a 4.6L but that's a rear-wheel-drive. You need to supply accurate information so I can look up the right wiring diagram.
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Monday, May 18th, 2015 AT 10:37 AM
TOYA GOTCHER
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It is 4.6 rear wheel drive. Sorry just a woman trying to figure out the problem
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Monday, May 18th, 2015 AT 10:41 AM
CARADIODOC
MECHANIC
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The problem is the insane engineers have seen fit to hang a computer onto ever possible system, so it's hard to determine what should still be working. Is there anything that works now? In particular, it appears the power door locks should work. See if you can find anything with a hint of life. If you can't, you'll need a test light, then we'll start at the battery and try to find where we're losing voltage.
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Monday, May 18th, 2015 AT 10:57 AM
BOESHEMIS
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I am having the same problem as above. I'm going to check the positive cable for integrity and get back with you.
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Thursday, November 18th, 2021 AT 10:50 AM
JACOBANDNICKOLAS
MECHANIC
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Hi,
I noticed it has been a few days since we heard from you. Has any progress been made? We are interested in knowing.
Let me know.
Take care,
Joe
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Monday, November 22nd, 2021 AT 8:06 PM
BOESHEMIS
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When we wiggled the positive battery cable, we got power intermittently and at one point was able to start the car. We're going to change the terminal on the positive cable, and we think that will do the trick. There's a lot of corrosion where the wire meets the terminal, but the whole thing is pretty old, original parts.
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Monday, November 22nd, 2021 AT 8:12 PM
JACOBANDNICKOLAS
MECHANIC
109,645 POSTS
Absolutely, that sounds like the problem. Make sure to clean the negative as well and make sure both are clean and tight.
If you have a chance, let me know how things turn out for you.