[V8] Cluster woes
Armanmik at earthlink.net
Fri Jan 5 13:09:09 EST 2007
> The V8 cluster is not at all like the 100/200 clusters and do not suffer from
> the cracked flexible trace problem they had.
> Soldered connections do not normally fail - all cars have thousands of them. The
> only weakness I found in the V8 dash was the solid wire ribbon cables that
> connect the various pieces together. You could in fact have an intermittent
> there, but resoldering the connections is un-likely to fix it because the crack
> happens inside the molded plastic part where the "pin" attaches to the solid
I had similar very symptoms on my V8 - fuel and temp gauges dropped
sporadically to zero, came back with a whack on the dash pads. The pc
traces were fine, the problem was cold solder joints at the pins that
the interboard ribbon cables connect to.
These are assembled by "wave soldering" - does the whole pc board at one
Problem is that if there's enough heat to solder the big parts (high
thermal mass), it is too much for the ICs and other smaller parts and
they get toasted.
I've seen this on other electronics equipment - *exactly* the same
thing, cold solder joints on the large pin connectors - PC power
supplies are good for that.
Cure is remove the cluster, take the boards off one at a time, and with
a fine pencil iron, re-solder the bases of the interboard connection
pins one by one. Put it all back together (now is also THE time to
change all the burned out dash lights) and dollars to donuts your
problems will be cured. I found four bad ones and some more suspect
ones. You will be able to wiggle (as opposed to flex) the pins slightly
in the pc board if the solder joint is bad. Also, a cold solder joint is
"grainy" or "pebbly" instead of smooth and shiny. Use a magnifying glass.
Use some contact enhancer on re-assembly just as extra insurance.
I did mine almost two years ago, and that part (at least) has worked
V8Q, lights, blinks, starts, runs (be afraid . . . )
More information about the V8