Mechanics

F150 ACTS LIKE BATTERY IS DEAD, WON'T START

2000 Ford F-150

Electrical problem
2000 Ford F150 V8 Four Wheel Drive Automatic 180000 miles

My truck has had the gauges pegging maximum for a while now when I turn the ignition to on. It always started though. The other day while driving, the radio went off then the wipers. Both came back on at different times and then the radio continued to go off and on routinely for the next few days. The next day the trucks key reminder ding dinged as if the keys were in the ignition when they were not and the radio came on by itself while parked with no keys. I cleaned the battery terminals as they were corroded and I thought it might help. The alarm chirped when I reinstalled the cables. No big deal. Then when I went to start it again the radio would not come on, the gauges pegged maximum and one of the relays under the dash kept clicking. The radio would come on when I turned the igniton to accessory but nothing else would light up. Then the alarm went off and would not respond to either remote so I disconnected the battery to get it to shut off. Now it just acts like the battery is dead when there is actually 12.43 volts present. The relay continues to click under the dash and the truck still wont start.
Avatar
Eman846
April 5, 2008.



Well I thought I would reply to my own post so if anyone else has this particular problem they could use this info. After testing the ignition switch, looking for shorts, loose connections, checking fuses and the clicking relay (relay #2 under the dash - the battery saver relay), I replaced the battery after watching the voltage steadily drop while attempting to start the vehicle and realizing what that relay was for. After it still wouldn't start, and I remembered that the alarm module was acting up (going into alarm and not taking commands from the remotes) so I tested the votage going through the starter wires. (Red with a blue stripe going into the module and red going to the starter) I bypassed the module by completely removing it and splicing the red and red/blue wires together. Vroom.


http://www.2carpros.com/forum/automotive_pictures/175758_DSCN3663_1.jpg



http://www.2carpros.com/forum/automotive_pictures/175758_DSCN3665_1.jpg



http://www.2carpros.com/forum/automotive_pictures/175758_DSCN3666_1.jpg


Tiny
Eman846
Apr 5, 2008.
So did that fix it? If so that is a really good find, glad you remembered the alarm was acting up, we could have been at it for a while til we got to that

Tiny
Jack42
Apr 6, 2008.