My 89 XJS V12, just completed a water pump change, cooling fine. But hazards and indicators won't work. Fuses are fine. can anyone suggest another area to check?

 

Exercise the hazard switch a bit vigorously a couple dozen times.

The contacts inside the switch can oxidize and the exercising will sometimes clean them.

The turn indicator circuit takes its power from the hazard switch. A problem in the hazard switch can disable the indicators.

If no joy you could try just replacing the flasher. There's a decent chance that's the problem. Ideally some diagnoses with a test light or meter would come before replacing parts but, as guesses go, a flasher isn't very painful.

Cheers
DD

 

Thanks Doug. It seem strange that it would just stop working. I will pull the switch and try your solutions.
greatly appreciated.

 

You have to remember you have Lucas electrical parts. They barely work when new, and only get worse with age. Nothing strange at all.

 

the flasher seems the obvious as non of the other option have solved the problem ,
I have looked and tried to locate the flasher unit but there are no clear indications to its location.
is it under the bonnet right side last relay?

 

Wiring diagrams and component location, link at top of page:
http://jagrepair.com/JaguarXJSElectricalOBDIIcodes.htm

 

Are you 100% sure the fuse has a good connection in its holder? Lucas... Been there
Evert