STOP light fun, I don't think :(

Foghorn Leghorn · Post by **Foghorn Leghorn** » Mon Sep 04, 2006 6:48 pm

Ok guys and gals, my STOP light came on intermittently on the way home this evening. Centre console display read 'coolant temp too high', coolant temp was where it should be, parked up and double checked and all was ok coolant wise. Turned off aircon and STOP light went away, doing my best Alan Partridge impression 'Ahaaa!!' I said. Radiator fan, checked it and its spins up then cuts off, almost stops, STOP light comes on for a split second then the fan spins up again, then slows again, STOP light back on briefly etc etc.....

I guess this is my fan going intermittent or a dodgy contact, could you knowledgable folks confirm the diagnosis before I start dismantling the wrong bits

.

Cheers dears

Fog

jameslxdt · Post by **jameslxdt** » Mon Sep 04, 2006 6:55 pm

you need to change both the cooling fans and the three relays that operate them

chili · Post by **chili** » Mon Sep 04, 2006 7:02 pm

maybe a thermostat on its way out

Foghorn Leghorn · Post by **Foghorn Leghorn** » Mon Sep 04, 2006 7:03 pm

jameslxdt wrote:you need to change both the cooling fans and the three relays that operate them

Cheers James,

Forgot to say, this is on a D9 with one large cooling fan, if that makes any difference.

Fog

jameslxdt · Post by **jameslxdt** » Mon Sep 04, 2006 8:20 pm

didnt know it was a d9 with single fan, without the engine running get a long screwdriver and try turning the fan if it feels rough or there is some resistance it could be the bearings are going in the motor, also a pressure test of the a/c system would be a good idea, if the pressures are going through the roof the stop light will come on and the cooling fans can develop a mind of there own, i know the d8 has a cooling fan ecu which also plays up alot, not sure if the d9 suffers with the same problem
could also be the cooling fan switch

Foghorn Leghorn · Post by **Foghorn Leghorn** » Tue Sep 05, 2006 8:32 pm

Thanks for your help guys, it was one of the resistors, poor little beggar has gone open circuit.

Fog

Post by **Welly** » Wed Sep 06, 2006 8:49 am

So how did you know and how did you sort it fella? this could be a good 'how too' as it seems a bit common.

Spill the beans Foggy...............

GeordieBoy · Post by **GeordieBoy** » Wed Sep 06, 2006 12:16 pm

I'm getting 'coolant temp too high' intermittantly atm, but aint checked me fan.

Foghorn Leghorn · Post by **Foghorn Leghorn** » Wed Sep 06, 2006 7:59 pm

I'll whip my camera out this weekend and take some snaps. Might have to do a little how to guide for the forum (good idea Mr Welton, sir)

Fog