speedo disassembling: need help!
tlum at flash.net
Sun Jun 24 10:48:06 EDT 2001
At 11:32 AM 6/23/2001 -0400, you wrote:
>No, I am not stupid. I just need to read what I have typed befor I send
>it. It is
>about "fuel tahometer".
>My concern is that if I need to take off that big board from the assembly
>then I have
>to remve some jumpers and maybe something else. Jumpers are special in the
>they have wire hooks at the bottom to grab the board. I did not know
>about that and
>when I pulled one I was scared that I broke something.
> I am not sure that part I should remove and what parts can be removed
> w/o damaging
>I will appreciate your help.
It looks intimidating, but it turned out easier than I though. I removed
the hinged white plastic rear piece, then all of the hex cap screws on the
board. The board will then pull away from the plastic base. The
speedometer unplugs from the front as does the tachometer. You then
resolder the 4 light green molex connectors on the pc board assembly. I
used the desoldering equipment at work to ensure very good connections, but
you can do just as well with a small soldering iron and desoldering
braid. Just to be sure I had solid joints, I used a illuminated magnifying
inspection scope, but a hand magnifying lens will suffice. Be careful not
to let any solder fall into the connector hole. Once desoldered, the molex
contacts flex easily so try to press them down with a screwdriver or needle
nose pliers. I noticed that the square pins of the speedometer appeared to
have some oxidation where they contact the molex connector, so I scraped
them with the back of an Xacto blade knife and sprayed some DeOxit5 on
them. Having replaced the pc board assembly back onto the plastic base, I
took the speedometer and inserted back into the contact holes and slid the
speedo up and down several times. I then reassembled the whole cluster and
put IC back into the car. The speedometer is now solid as a rock and the
cruise control now works as it should.
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