Electrical Problem!!
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Freshman User
Joined: Jul 2009
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From: DFW area
Electrical Problem!!
99 F250 PSTD 4x4 7.3
Thanks for looking guys. Couple of days ago I started having start-up issues. Had to jump it and go that way. Thought it was the alternator but had it all tested and found out I had a bad battery. The truck was fine yesterday. I wake up today and my truck is dead. I noticed my brake lights were on even though my truck was off. Now I have no juice. My alternator? electrical issue? how do I narrow it down?
Thanks for looking guys. Couple of days ago I started having start-up issues. Had to jump it and go that way. Thought it was the alternator but had it all tested and found out I had a bad battery. The truck was fine yesterday. I wake up today and my truck is dead. I noticed my brake lights were on even though my truck was off. Now I have no juice. My alternator? electrical issue? how do I narrow it down?
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Freshman User
Joined: Jul 2009
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From: DFW area
so I perfomed a multimeter test between the a cable and the post on one of my batteries and the reeading showed a draw of 0.800 amps. pulled all fuses in the cab and under the hood one by one and left them off and disconnected alternator and still at 0.800 amps. no clue what to do next. put a trickle charger on my batter overnight last night and started right up this morning. sat for about 4 hours and I went to crank it and it was dead again. is there anything else that still draws when all fuses are pulled and alternator disconnected?
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Freshman User
Joined: Jul 2009
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From: DFW area
brake light
think the brake lights were intermittently coming on and off because my batteries were on their last wind. brak lights stay off when it is charged and running. thanks for the reply though. im stumped.
Cargo Master
Joined: Apr 2010
Posts: 2,405
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Weak batteries will not cause your brake lights to come on. It's the other way around.
I wish you luck. Electrical issues on these trucks can drive a man to drink.
(That reminds me, I have to stop for beer after work.)
I wish you luck. Electrical issues on these trucks can drive a man to drink.
(That reminds me, I have to stop for beer after work.)
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Freshman User
Joined: Jul 2009
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From: DFW area
so i went out to my truck this evening and my driver side battery was real hot. not sure if it was from the draw or not. thoughts?
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Cargo Master
Joined: Apr 2010
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You possibly have a hot wire somewhere jumping to ground. It would be a big wire. Check the wire going to your starter for damage.
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Cargo Master
Joined: Apr 2010
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From: Acworth, GA
PoPo54,
I have some troubleshooting tests posted in an album, on my profile page.
Here's the link;
https://www.ford-trucks.com/forums/m...needs+it..html
Let me know if they help.
I have some troubleshooting tests posted in an album, on my profile page.
Here's the link;
https://www.ford-trucks.com/forums/m...needs+it..html
Let me know if they help.
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