Noise from under the dash
Thread Starter
|
5th Wheeling
Joined: Jan 2003
Posts: 47
Likes: 0
From: Oregon Coast
Noise from under the dash
I recently bought a early 1999 F250 Crew Cab with Auto transmission and the 7.3 liter diesel. When I turn the key to the run position to light up the glow plugs I hear a rapid clicking, almost buzzing for maybe one second coming from under the drivers side of the dash. The truck starts and runs fine. I asked the service department at the local dealership and they did not seem too concerned.
Is this a common thing with these trucks?
Thanks
Matt
Is this a common thing with these trucks?
Thanks
Matt
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Not really. It is probably telling you the batteries are weak and won't make it through the winter. The PCM needs 10.5 volts to operate the truck. When that power becomes marginal on weak batteries during the GP on WTS cycle, the relays will click. I would have the batteries load tested before you get stranded. Any auto parts store will do this for free. Good luck and I hope this helps.
Oh yeah, make sure all your battery cables and connections are clean and tight. If that is not your problem, you have peace of mind on the batteries anyway.
Oh yeah, make sure all your battery cables and connections are clean and tight. If that is not your problem, you have peace of mind on the batteries anyway.
Last edited by Tenn01PSD350; Oct 10, 2007 at 10:41 PM.
Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
Tenn is right. CHeck the bats and ends. When I had a dirty end, I got this clicking like you describe and my gauges went nuts. I cleaned the ends and have been fine ever since (bats were only a month old at the time).
I put some dielectric grease around the outside of the ends to keep them clean.
I put some dielectric grease around the outside of the ends to keep them clean.
