Testing rear wheel speed encoder

[Scotland North AR]

Hi, after driving to Applecross from Aberdeen in a deluge on Saturday, ended up with a blown headlight bulb, non-functioning brake lights (dead switch in the end) and a dead speedo.

Can the sensor mounted near the rear wheel be tested on a multi-meter to see if it is the culprit, if so how?

 

 

[Jonathan Kay]

Don't know about the headlight bulb: which fuses have blown? Do they blow again?

There's a Caterham Workshop Notice about improving the wiring of the speedometer circuit.

Can the sensor mounted near the rear wheel be tested on a multi-meter to see if it is the culprit, if so how?

You can test power and earth but signal might be a problem. But most (? all) of those sensor units have a built-in indicator light. After checking and replacing fuses I'd start with that.

There are also some advice on how to set the clearance of the sensor to maximise reliability.

Jonathan

[Scotland North AR]

Thanks Jonathan, there were no fuses blown, the head lamp bulb just shattered for some reason, maybe a cheap bulb. The car is always driven gently and I don't go over bumps or potholes*biggrin*

I'll need to look for the workshop notice WN572 now.

[John Vine]

I'll need to look for the workshop notice WN572 now.

Send me a PM with your email address and I'll email it to you.

JV 

[John Vine]

Nigel, YHM.

JV