won't stop running!!!!
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Joined: Oct 2006
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won't stop running!!!!
I have a 1986 F-150 XLT lariat. 302 auto with A/C. during the last 8 years the truck has been very reliable. Recently when my wife used my truck, she told me she couldn't turn it off. I figured the ignition switch was probbly worn out and replaced it. I did not see any improvement. When the truck does shut off with the ignition switch, I can hear a relay under the dash clicking. Unplugging the relay stops the clicking, but there is still a drain on the battery. I must physically disconnect the battery in order to prevent it from discharging 100%.
While driving I can feel the ignition momentarily turning off, then back on. Sometimes frequently, other times not.
I'm certain the ignition switch was replaced correctly. Although I plan on tripple checking that.
Anyone have any ideas where to start?
Also, I don't seem to have access to the forum search function. How do I get that working?
While driving I can feel the ignition momentarily turning off, then back on. Sometimes frequently, other times not.
I'm certain the ignition switch was replaced correctly. Although I plan on tripple checking that.
Anyone have any ideas where to start?
Also, I don't seem to have access to the forum search function. How do I get that working?
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Joined: Nov 2003
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From: State College, PA
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Ok, heres what I have been able to find out so far:
Correct me if I'm wrong, if I REMOVE the ignition switch from the equation (physically unplug it). with all the wire and relays plugged in I should not have a 5 amp drain on my battery. if I rember correctly there should only be a .05 amp drain max under normal conditions.
If I do still have a drain on the battery it would indicate a shorted wire.
let me know if I am correct with my thoughts.
Thanks!
- there is a constant 5 amp drain on the battery regardless of the keyswitch position.
- If I unplug the relay under the dash board inside the passenger compartment(fuel pump relay?), the truck will stop running. The 5 amp drain is still there.
- If I unplung the green relay at the firewall R-hand side engine compartment. the 5 amp drain is still there.
- there are 4 14 ga. wires at the starter solenoid. By removing 1 at a time I was able to eliminate the 5 amp drain. The wire is either black or brown at a short distance from the solenoid it is spliced into a yellow/white wire black and one other color I don't remember. It seems the y/w wire is part of the starting and charging system.
- The wires on each of the relays that activate them are 12V regardless of key position.
- When I turn the keyswitch to the off position the A/C clutch disengauges, instrument panel turns off and blower for the heater stops, engine still running.
Correct me if I'm wrong, if I REMOVE the ignition switch from the equation (physically unplug it). with all the wire and relays plugged in I should not have a 5 amp drain on my battery. if I rember correctly there should only be a .05 amp drain max under normal conditions.
If I do still have a drain on the battery it would indicate a shorted wire.
let me know if I am correct with my thoughts.
Thanks!
