coolant temp gauge & elec. thermoswitch

[Trevor Irwin]

That's probably what I will do, but even still, whether I replace the
switch or not, when I grounded the connector, shouldn't the temp gauge
have gone to maximum?

Trevor

On Thu, 20 Jun 2002, Brian O' wrote:

|
| just replace it and get it overwith, everyone should do this as soon as you get your car !! they are all junk, if they have the 4 prongs, they are old !! this also can shut down your a/c, i fixed a car with this switch before, and odds are your guage will work, its only about 20-25 bucks, get a german one too !!!
|                                                                              brian o'
|93 90 cs
|93 100 csq
|91 80 ( for sale )
|88 944 turbo s ( for sale )
|
|  Trevor Irwin <trirwin at indiana.edu> wrote: (1989-1991 100/200)
|
|The coolant temp gauge doesnt work, needle doesn't budge. It hasn't worked
|since I've owned the car, but on a few occasions I have seen it work, but
|this happens so rarely I don't know if it should be classified as
|intermitant behavior.
|
|I thought that the problem might be the electronic thermoswitch, which is
|the older four terminal variety, but I don't know how to test the switch
|itself.
|
|I removed the connector from the switch and, with the ignition on, got 12
|volts from the three contacts going to the temp gauge, A/C control unit,
|and the overheat warning light. However, I only got about half a volt from
|the plus voltage supply contact.
|
|When I grounded the contact that goes to the temp gauge, I thought it
|should have made the needle on the temp gauge go all the way up to
|maximum, but nothing happened. Similarly, when I grounded the contact for
|the overheat warning light and A/C control unit nothing happened (with the
|engine running and the A/C on).
|
|Any ideas?
|
|Trevor
|
|
|
|---------------------------------
|Do You Yahoo!?
|Sign-up for Video Highlights of 2002 FIFA World Cup

-------------------------------
T. L. Irwin
Swain East 335
855-3573
php.indiana.edu/~trirwin