(did a search already) Alt problems
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Joined: Dec 2006
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(did a search already) Alt problems
I have a 90 F150.Battery went out on me last week.Bought a new one put it in
yesterday.Started right up,but the gauge on the dash was peged out at 18 volts an the
battery light is on.When the truck idles its normal but when it gets above 1000 rpms its
back up to 18 volts.What gives???"??I took the Altinator to the parts house they put it on
there test bench an it was working fine .........ARGHHHHHH!!!!!!!!!!
What now??????
I did a search cant find anything that matches my problem..
Please help.
thanks
Billy
yesterday.Started right up,but the gauge on the dash was peged out at 18 volts an the
battery light is on.When the truck idles its normal but when it gets above 1000 rpms its
back up to 18 volts.What gives???"??I took the Altinator to the parts house they put it on
there test bench an it was working fine .........ARGHHHHHH!!!!!!!!!!
What now??????
I did a search cant find anything that matches my problem..
Please help.
thanks
Billy
Senior User
Joined: Sep 2004
Posts: 484
Likes: 0
From: SC lowcountry
You may well have a wiring problem - you need to get a voltmeter and check the voltage while idling and a higher RPMs. Should have 13.5 to 14.5 volts at idle and above if charging properly - the meter on the dash may or may not be reading right.
The only tine I had a battery light on 88 model the regulator in alternator was gone, putting out too much valtage which will cause battery to die.
If you don't have ameter go to a goof electric shop in your area.
Good luck.
The only tine I had a battery light on 88 model the regulator in alternator was gone, putting out too much valtage which will cause battery to die.
If you don't have ameter go to a goof electric shop in your area.
Good luck.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Originally Posted by dv_shane
mine went out and i put a 125 amp chevy delco alt on and it works good just had to fab 2 brackets uses same stock serpintine belt. i dont like ford alts and i had a chevy just sitting there.
Maybe you should be driving a Chev then.....
