Choke/Temp Sender wiring

R

Rangi246

New Member
Hi all

I'm a new P6 V8 owner, love the car but hate the fact the temperature gauge doesn't work. It won't register any movements on the needle, even when I turn the ignition on. The fuel gauge works perfectly though.

I was poking around the engine bay the other day and noticed the wire going to the temp sender is very slack with plenty of length available but the wire going to the choke warning unit is very tight with no play in it at all. Could it be possible that someone has put these wires round the wrong way? The choke warning light doesn't work either.

I'm not an auto electrician, in fact its the one area of vehicles I hate dealing with so I was hoping to use the highly scientific method of finding out what colour wires other V8 owners have on their temp and choke senders please?

Cheers
Mark
 
Rangi246 said:
I'm not an auto electrician, in fact its the one area of vehicles I hate dealing with so I was hoping to use the highly scientific method of finding out what colour wires other V8 owners have on their temp and choke senders please?
Click to expand...
Hi Mark.

I agree with Colin. According to the circuit diagram I have for my 1972 V8, the choke warning wire colour is White/Blue, and the temperature sender wire is Green/Blue.

I would have thought that if the wires were swapped, and the choke sender unit was working, then you would have seen some movement on the temperature gauge, probably from cold straight to hot, once the car had warmed up. One sure way to test the wiring would be to simply touch each wire in turn to the body of the car or engine, (with the ignition on of course), and get an assistant to tell you if there is any movement on the gauge, (should indicate hot).
 
The choke warning light can have issues at the knob end with the switch becoming loose on its mount. With the age of the cars now it not unlikely that the actual manifold mounted switch has also gone faulty, these are known as an Otter switch and are available, a search on the forum here should spring to light a supplier.

Graeme
 
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