Thread: RRC 81 Water Temp (and other things)

Swapped the resistor from the other cluster. Made minimal difference, so I guess the next things to check are the earthings and then, if nothing, spend some money for a new thermostat!

Thanks for you help guys.

Originally Posted by StuRR80

It doesn't move move (but there's not much room to move upwards which is the worrying factor) but I would have though it would be sitting the otherside of 1/2 way?

Hi Stu,

Does it read that high right from start up? If it does and stays in one place the wires could be round the wrong way to the gauge.

My oil pressure gauge does the same and I know that's the prob, but I'm too slack to fix it.

cheers, DL

Hi DL,

It does take it's time getting to that point, so it does show the motor actually warming up.

I don't think there's much to go wrong with the wires (other than them becoming brittle and snapping as my oil pressure one did! ) because there's only one wire for the sensor which basically runs via the loom to the back of the cluster and plugs (still only one connector) to the back of the gauge.

Cheers

Hi,

That first photo shows the oil temp sender (light green wire), oil pressure warning switch (white with brown tracer) and oil pressure sender (light green, brown tracer).

The water temp sender is up top near the front of the motor with a green wire, blue tracer. The light green wire going to the back of the water gauge comes from the voltage stabilizer. It's in the right spot, goes from there to the fuel gauge as well.

cheers, DL

Originally Posted by 350RRC

Hi,

That first photo shows the oil temp sender (light green wire), oil pressure warning switch (white with brown tracer) and oil pressure sender (light green, brown tracer).

The water temp sender is up top near the front of the motor with a green wire, blue tracer.

cheers, DL

Just testing!!
I don't know why I put that one up. Trying to do too many things at once, probably.

I've taken a couple of pics now and whilst doing so, I might see what the issue is. As LPG's installed, there seems to be green wires going everywhere. Perhaps it's not the right green wire connection after all?!!

When I get a chance, I'll unwrap the tape and track where the wires run. Just quickly looking at it, that green wire might lead to the solenoid (or whatever it is?) for the LPG near the piping coil. The last pic shows the othert green wire which ends up at the LPG electronic switch.

I'll get there one day whith all this electric/ mechanicy stuff!

OK. Checked the wiring and beside a dodgy solder and extension on the lead, I think it is actually connected to the right wire. I guess I wouldn't be getting a reading on the dash if it wasn't?!

I pulled the green wire off the back of the cluster and the temperature stayed where it was. Is this wire the earth? I had my voltmeter (not that I can actually diagnose what it's telling me - too many symbols!) on the "sticking out bit" directly behind the temp gauge which gave numerous readings.

Other than that, I'm not sure what else to check, other than to replace the thermostat or the printed circuit (which has definitely seen better days) but at GBP70.00, I'd hope to get away without replacing it!

Originally Posted by StuRR80

OK. Checked the wiring and beside a dodgy solder and extension on the lead, I think it is actually connected to the right wire. I guess I wouldn't be getting a reading on the dash if it wasn't?!

I pulled the green wire off the back of the cluster and the temperature stayed where it was. Is this wire the earth? I had my voltmeter (not that I can actually diagnose what it's telling me - too many symbols!) on the "sticking out bit" directly behind the temp gauge which gave numerous readings.

Other than that, I'm not sure what else to check, other than to replace the thermostat or the printed circuit (which has definitely seen better days) but at GBP70.00, I'd hope to get away without replacing it!

The fuel and temp are constantly powered and the sensor is a variable resister to earth. You need to make sure are no earth leaks. On the power side the Voltage stablizer do pulse (I think)so may be hard to read with a digi meter.
when the temp is hot feel the top hose. If just unpleasent to touch is around 80 to 90 deg. If cold thermostat is stuck or no H20. If scalding hot and hose soggy is overheating. Just a rough gide with old gear we have here with no engine protection.

If I get time I will post up resistance of the temp sensor in my old Rangies at running temp. You will need to know how to drive a multi meter to do this.

Tony