If your VW temp gauge works as far as indicating temps, you can easily
add the coolant level sensor wiring to make the led flash. Best to put
the relay in the engine compartment but not critical to do so. The relay
needs switched +12 power like from the ignition coil, a ground, and a
wire from the level probes with the other probe wire grounded. Then a
wire leaves the relay and splices into the single temp gauge wire to
trigger the led. Hard to be much simpler. Power, ground, signal in,
signal out.

Mark

neil n wrote:
> Hi all.
>
> Am pulling my hair out wiring in a low coolant level sensor. Got it
> all in, but light just blinks.
>
> Though the '85 WBX gauge/LED unit fit in, it dawned on me that the
> foil circuit on my *air* cooled instrument cluster is different than
> the WBX. I wired the low level warning controller as per a 1.9 WBX.
> Likely I should wire things as per the diesel, which may mean no low
> level coolant warning light.
>
> I chose this route as I wanted to rebuild my spare '85 cluster and use
> the air cooled (and keep the analogue clock) in the meantime.
>
> Are the WBX temp gauge and Diesel temp gauges the same?
>
> Is it likely that my '81 air cooled instrument cluster foil is "wired"
> as per a diesel?
>
> Much TIA. I have so little hair left to pull out!  ;)
>
> Neil.
>
>
> --
> Neil Nicholson '81 VanaJetta 2.0 "Jaco"
>
> http://tubaneil.googlepages.com/
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>