Re: 1990 740 speedo problem
"Randy G." <frcn@DESPAMMOcncnet.com> wrote in message
> "Michael Pardee" <firstname.lastname@example.org> wrote:
> >"Richard Setford" <email@example.com> wrote in message
> >> Hello again,
> >> been a while since my last posting but have been keeping up with
> >> everything (pretty much anyway).
> >> I've got a issue with my 1990 740's speedo. When traveling along at any
> >> speed over any surface it will just drop to zero. A well placed tap on
> >> top of the dash brings the speedo back to life.
> >> Some days it won't do it at all, others it won't work for miles and
> >> bring itself back to life. I've had a feel around behind the speed
> >> quite easy to access from underneath the dash) and can't feel anything
> >> that's come loose at all so I'm guessing that it's a dry joint
> >> Any suggestions as to what I should do? If possible, I'd like to avoid
> >> taking the dash apart but if needs must then so be it.
> >> Thanks and regards,
> >> Richard
> >Solder joints on the instrument cluster PC board are the usual culprits.
> >Unless yours is very different from our 85 model (I don't think it is)
> >getting the instrument cluster out and back in is very easy. Once the
> >are removed from the front the cluster can be pulled far enough out to
> >unfasten the connectors and voila! you have it. The connectors are
> >so there is no need to mark which goes where. Just note any connectors
> >are vacant on the cluster, and maybe tie a string to the connectors
> >you remove them so they don't try to lose themselves behind the dash (not
> >really a problem). The cluster goes back in the reverse of the way it
> >out; slide the top in first.
> Yes- easy to remove.
> Also, I found that my octal connectors(?) were pretty dirty and needed
> cleaning as well. Also a good time to replace bulbs where necessary
> (look for darkened bulbs, and removing and replacing them also helps
> maintain a good connection. And i took the opportunity to remove the
> instruments and clean out the inside of the cluster as well.
Doesn't the '90 use the newer instrument panel like the 940s have? I think
it's a little different to remove, but still quite easy.