In a message dated 2/17/2008 11:58:56 PM Eastern Standard Time,
citroends@prodigy.net writes:
OnOur 84 505TD has had an interment problem with the preheat control
box. Most of time it would work, then increasingly it would not.
About 10 days ago it quit altogether. After a week of popping the
hood,
lifting the cover off the control box and holding the contacts
together on the relay inside the box for about 5 seconds, warming
the glow plugs, then running around to the ignition switch to start
the car; I found time to troubleshoot the problem.
The circuit was good to the control box so I checked the ground for
the box and it was good from the connector to ground.
I thought I was in for a new control box and another week of the
spectacle of starting my car the way I had been. I still had a
feeling it was a bad ground. I popped the cover off the control box
and put my ohm meter across the relay coil. It had continuity.
I went from both sides of the coil to ground and found one side had
about 55 ohms and the other about 45. The resistance of the coil
was about 10 ohms. The relay coil was not grounding inside the
control box very well. I soldered a wire to the 45 ohm side (the
ground side) of the coil and connected the other end to ground. Now
it works every time.
I am thankful that I didn't have to buy a new preheat control box.
Robert
Robert--
Thanks for sharing your repair with the rest of us. I copied and saved it in
case I have the same probem in the future. I'm sure it will help many people
avoid the expense of a new control box.
Kevin
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[Non-text portions of this message have been removed]
Received on Sun Feb 17 22:18:51 2008
