Caterham Turn Signal Relay

[JBH]

My right turn signal buzzes the relay, but the left blinks properly. I think my relay is bad - I checked the bulbs.

 

The relay is a Wehrle 54 102 101, 12 V 3-prong. I can not find a relacement supplier for the exact relay when I search the internet. Anyone have a replacement part number or supplier for this relay?

[fnmag58]

unless I'm mistaken, the relay doesn't know if it is running the left or the right turn signals. If the bulbs are good, I would start checking the grounds--a high resistance ground will result in the problem you indicated. Also make sure you have the exact same bulbs for each side--there are a lot of bulbs that use the same sockets but the wattage is different resulting in diffent amperage draws. I had a similar situation recently and after correcting the high resistance gound, I decided to replace the relay. My 1982 uses a Triumph relay that i bought from Moss Motors. Can't find the paperwork right now, but if you need I will look it up for you.

[HPC]

Check your battery voltage. I changed the relay in my Caterham (exactly that one from Wehrle) when it refused to work but without success. I exchanged the battery then because the Cat didn't always start properly and the relay problem was equally gone, also with the old relay which I put back into the car.

 

BTW: The hazard lights even worked with the old and weak battery so its not a case of "all or nothing".

[JBH]

As weird as it may seem (and I still don't understand it), the problem was in the turn signal toggle switch. The resistance on one side was just enough to cause the problem.