Another temperature gauge not working

[kcbart]

Hi,
I am a new owner with a temperature gauge doesn't move - it stays just out of sight on the left of the gauge!
The warning light blinks rapidly on startup and then goes out, which would appear to be normal.
I have read the wiki and searched the forum which lead me to check the following:-

1. The temperature sender is blue with 2 wires. I have checked that one is a good earth. I then connected both wires cutting out the sender from the circuit - this had no effect on the gauge.
2. I removed module 43 from the fuse board and put a jumper between the two slots as per the wiki - the gauge moved all the way to the right.

I deduce from this that the gauge is ok and the sender is probably ok (unless I have two problems) and I now have to check module 43 or the wiring from the sender to the fuse board. Can someone please enlighten me on how to check these.

Many thanks

[MidLifeCrisis]

Are you sure that you are looking at the correct sensor - I thought the coolant temp sensor had a single wire going to it (not two)?

[itchyfeet]

Late van has a plastic thermostat housing so has a two pin connection, early van is metal so a single connection is possible

[itchyfeet]

just re read your post temp sendor is NOT blue, thats the carb heater relay switch, check the wire colours yellow red is the guage wire and has a brown ground
other blue switch is lilac black and black which is +12v ignition


Can you get a link up to the wiki that says short two pins please on the 43

[MidLifeCrisis]

Late van has a plastic thermostat housing so has a two pin connection, early van is metal so a single connection is possible

Ah - I learnt something new today .... thanks!!
(Just reread that and it sounds massively sarcastic - but it wasn't meant to be!!)

[itchyfeet]

Late van has a plastic thermostat housing so has a two pin connection, early van is metal so a single connection is possible

Ah - I learnt something new today .... thanks!!
(Just reread that and it sounds massively sarcastic - but it wasn't meant to be!!)

Dont worry i like sarcasm those that say its the lowest form of wit just dont get it

[kcbart]

Thanks for the replies.
The blue sender was the only one I could see. It is on the thermostat housing at the back left of the engine looking from the rear and points towards the left side of the vehicle. I cannot remember the colour of the wire but I don't think it had any yellow so it looks like I may have the wrong one. I will look again tomorrow.
I don't know how to put a link to the wiki but the gauge test is under:-
7. Coolant and heating
7.1 Cooling system
Temperature gauge and sender malfunctions.

[itchyfeet]

Thanks, you just copy and paste the adress from your browser top bar into the post...

https://club8090.co.uk/wiki/Co ... alfunction" onclick="window.open(this.href);return false;

ok thats linking pin 4 which is the yellow/red from the guage to ground on pin 6 it proves your guage and wire from fusebox to guage works
so its going to be sender, sender earth or yellow/red from sender to fusebox broken

have another look there are two positions in the plastic thermostat housing for a sensor and a switch, they can be swapped in positions

[kcbart]

Had another look this afternoon and sure enough there's another sender at the back with a yellow wire going to it. It couldn't be in a much more inaccessible place!
When I took the plug out the yellow wire came away - it was totally corroded. I cleaned the wires and shorted them together and the gauge moved. I discarded the plug and used spade connectors to connect it all back up again and then went for a run. The temperature gauge now works as it should.
Many thanks for your help, it is much appreciated.

[itchyfeet]

Excellent news