Problem - How to check the gauges ?

Salty my old son,

I think this is the sort of problem best discussed over the kitchen table with a couple of Bundy and coke. hmmm......... when would be a good time???

Hocka

Hi mate, is the probe fitted in the turbo's dump pipe? You have taken it for a quick drive to check right?? The engine will have to to be under load for the gauge to read. It will not show a temperature just idling as the VDO gauge starts at 100deg C. If the needle still does not move, then i'm not sure. Re-check you rwiring connections maybe....

Cheers,
Dan

Another thing could be is that you have taken the 12 v off a light circuit and it wont go without the lights on

fitted one about a month ago. easy as pie.

Go back to basics. Check you power is on the corect teminals, and check you thermocouple is correctly wired all the way through.

if you can remove the therocouple. connect a multimeter set on milli or better micro volts to the termials, and heat the tip of the therocouple with a ciggarette lighter. you should see a rise in voltage.

Salt grinder, I used to have one of THOSE vehicles ;-)

One of the mistakes I made with the VDO EGT Gauge was to shorten the wire. I crimped it but then took the vehicle to an auto leccie to wire the rest of the stuff. When he pulled the wire my crimping fell apart so he soldered it. The gauge never worked all the way home. (20km). I contacted VDO and was told NEVER solder the wire. (That is why people say not to shorten the wire). It CAN be crimped and after doing that properly the gauge worked correctly.

Malcolm

Hi Again Salty,

Please disregard my recent reply to your "where to fit the probe", as it seems it's too late.

If your EGT gauge is still not working, try this: remove the probe and heat the tip with a match or cigarette lighter to see if the needle moves up.

If not, are you sure the probe wires are the right way around? For American ANSI standard type-K thermocouples, the Red lead is Negative and the Yellow lead is Positive. (I don't know what No.1 and No.2 terminals are on a VDO gauge but if No.1 is positive, you're the wrong way around!)

If this all checks out OK and it's still not working, you may need to test the thermocouple with a multimeter. On a low Ohms range, measure between the red & yellow leads with the probe disconnected from the gauge. My thermocouples read between 10 to 15 Ohms at ambient temp. [This may vary with different probes and different meters, as the tiny thermoelectric voltage developed by the probe could have a different effect on the displayed resistance.] An open circuit (infinite or very high Ohms) means a faulty probe - take it back for a replacement.

Hope this helps.

Ian

Yep, told ya a couple of Bundies and a serve of the best fish in town would find the answer.
Hocka