Got a really great deal on a Gus Pfister rebuilt I/P for my '87 TD so plugged the thing in just before leaving on a little road trip a couple of weeks ago. While I was at it, I pulled the instrument cluster to replace the outside temp display. Got it started the evening before we left so there really wasn't time to troubleshoot the little issues that developed with the I/C at the time, but since returning I've pulled the I/C again to verify connections/grounds,etc. Anyway what developed all at once was that: 1) tach doesn't work 2) clock only works when key is off 3) glow indicator is nonop; starts fine though. So far I haven't found anything to indicate that all this happening at once is anything but coincidental, but if anyone can think of some one thing that might explain more than one of these issues I'd purely love to hear it.
Failing that, guess I'll have to approach them individually. Glow indicator is rather low priority; I'm going to be replacing the head soon and will be upgrading to an afterglow controller & plugs at that time anyway. I'm pretty much mystified by the clock's strange behavior though and the tach as well. Unless I hear a bettter idea soon, I guess my next step will be to take a look at the engine speed sensor which I take it is on the left side of the bell housing and which I'm wondering if I might have disturbed when I was fooling with the cruise actuator while replacing the I/P. Oh, yeah, almost forgot, I lost cruise function at the same time; never rains but it pours around these parts. ;( joe (on digest, and with a bad case of indigestion)
