Intermittent ignition
Thread Starter
|
Elder User
Joined: May 2008
Posts: 619
Likes: 1
Intermittent ignition
So this started up a couple weeks back. Occasionally when I turn the ignition switch to START, I get nothing. Then turning back to OFF, then START again, and I get the truck to start. I have seen problems in the past of the neutral safety switch on the column having poor connectivity and being intermittent, but this time, don't think that's the issue (I can try in P or N and no change). Does this sound like the key ignition switch or solenoid problem?
Thanks-
Thanks-
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
A simple measurement is required to tell whether it's the switch or the solenoid. Any premature speculation is unfounded.
The next time it won't turn over, pull the wire off the 'S' post of the solenoid and measure the voltage while the key is held in START. If you've got 12 volts, the ignition switch and neutral safety switch are fine. If no voltage is present, then the problem lies in the ignition switch or neutral safety switch - further testing can pinpoint which. For these purposes, a test light can take the place of a multimeter.
Since it's a one-time "sticky" problem, you may have to try a few times to get the failure to repeat.
The next time it won't turn over, pull the wire off the 'S' post of the solenoid and measure the voltage while the key is held in START. If you've got 12 volts, the ignition switch and neutral safety switch are fine. If no voltage is present, then the problem lies in the ignition switch or neutral safety switch - further testing can pinpoint which. For these purposes, a test light can take the place of a multimeter.
Since it's a one-time "sticky" problem, you may have to try a few times to get the failure to repeat.
Thread Starter
|
Elder User
Joined: May 2008
Posts: 619
Likes: 1
A simple measurement is required to tell whether it's the switch or the solenoid. Any premature speculation is unfounded.
The next time it won't turn over, pull the wire off the 'S' post of the solenoid and measure the voltage while the key is held in START. If you've got 12 volts, the ignition switch and neutral safety switch are fine. If no voltage is present, then the problem lies in the ignition switch or neutral safety switch - further testing can pinpoint which. For these purposes, a test light can take the place of a multimeter.
Since it's a one-time "sticky" problem, you may have to try a few times to get the failure to repeat.
The next time it won't turn over, pull the wire off the 'S' post of the solenoid and measure the voltage while the key is held in START. If you've got 12 volts, the ignition switch and neutral safety switch are fine. If no voltage is present, then the problem lies in the ignition switch or neutral safety switch - further testing can pinpoint which. For these purposes, a test light can take the place of a multimeter.
Since it's a one-time "sticky" problem, you may have to try a few times to get the failure to repeat.
Thread
Thread Starter
Forum
Replies
Last Post
NibblesDaCat
1987 - 1996 F150 & Larger F-Series Trucks
5
Nov 12, 2011 03:02 PM
mikerily
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Sep 5, 2009 03:03 PM
