TJSJEEP won't turnover

[dhlo]

Thanks JackstandJohnny for the offer!  I installed the new battery and she fired up like [insert nasty ex-girlfriend, current girlfriend or miserable wife metaphor here].  But, I'm keeping my eye on cold and running volts for a little while, so I might have to take you up on your offer.

My process:  Test voltage cold on old battery - ~12V.  Test when trying to start - fell down to 7V.  Installed new starter relay - no improvement.  Tried to install 40A fuse - wrong type.  Removed old battery and installed new.  Tested cold voltage - ~12.5V.  Running voltage - ~14.2. 

Although, I forgot to test the running voltage with everything turned on like the heater, lights, etc.  I'll try that tomorrow because it's time for beer now.

Thanks for your help!  Yeah, it's a simple fix that I should have tried first, but why not go to the experts first...

[scott slade]

STARTER...!!!!!!!   

[AV.NINE]

For christ sakes, do yourself a favor and get volt meter. Come back and we will help you diagnose some crap.



For the regulars - you are guys are the worst armchair mechanics in the world. DIAGNOSE DIAGNOSE DIAGNOSE

God knows, not one of you cheap bastards would ever just throw parts at a problem without knowing whats busted. But everytime someone asks a question here you start grenading parts suggestions before you have a clue whats wrong.

DIAGNOSE
RECOMMEND
REPLACE

Get your crap straight if your going to help people out.

End rant. Happy new year. Love you guys

Sorry Bill, but blatantly obvious battery issue.

The real question is why did the battery fail? age, alternator, bad grounds, bad wiring, frozen, etc.... hence the reason i said to test the alternator. But the fact the vehicle only started when being boosted pointed to the battery itself being the issue.

K.I.S.S. rule buddy!

[dhlo]

I agree with using my voltmeter, but I wanted to get broad (hehe) input on a broad (hehe) problem.

And, I agree with trying to figure out the cause of the failure.  It was about a 5y old battery, had to get it boosted a couple of times over the last couple of summers because the doors were off, the door fuse was pulled and I installed high intensity headlights and left them on (dead in hours), had been sitting idle for two weeks over Xmas (underground parking, so freezing is not possible) and had been sitting for a week earlier for a week.  The first boost worked, but second didn't (maybe a bad connection).

Ultimately, I think that it was a doomed battery.  But, I'll be testing with a voltmeter every couple of days for a while idle and running to look for any significant change in results that might lead to wiring or the alternator.  Plus, I'm gonna give the engine and undercarriage a good stray to get rid of the salt and crap.  Clean her up because she's dirty...

[Bnine]

K.I.S.S. rule buddy!

Keeping it simple is testing your crap before you buy parts. Period.