Hi Mick, when you say they sometimes work for no apparent reason, do you mean the sometimes work on there own without you using you indicators, or they work intermittently when using your indicators,
if they work on there own accord then its possibly a short in the wiring somewhere, the other alternative is possibly a defective flasher relay unit, hope this helps,
Laurence
April 2019
howtomendit.com for free repair help, information and advice.
