[s-cars] inop tachometer/need new tach?

[Kent McLean]

calvinlc at earthlink.net wrote:
> Did you measure continuity end to end when you were done soldering?  I have
> had bad solder joints stay bad after I re-flowed them...sometimes they are
> stubborn.  A simple continuity test would be good, although at this point
> its starting to look like the problem is somewhere else....but I would
> definitely think its got to be a loose/bad connection somewehere.

On the 200s, there is a narrow part to the circuit board where
the tach/speedometer come close to the edge.  Vibrations tend
to crack the circuits that pass through that narrow part.
Somewhere on the Internet is a picture of the gap that was
bridged with a short jumper wire, soldered to the tracings.
The closest I could come is this:

http://www.sjmautotechnik.com/trouble_shooting/instrument.html#IC

Maybe...

--
Kent McLean
'94 100 S Avant, "Moody"
'89 200 TQ, "Bad Puppy" up in smoke