In reply to a message from Alan4d sent Sun 28 Apr 2013:
I gave up on the coolant sensor on my 88. The float has a
magnet in it which opens and closes a reed switch in the
housing. Over tine, the plastic around the magnet cracks
and rust accumulates and that interferes with the accuracy
of the switch, which alarms when the circuit is open. I
finally shorted out the two pins in the plug to make the VCM
happy. I think the float in the brake reservoir works the
same way, but I haven’t had a failure with that one yet.
You can pull the switch and float out of the coolant
reservoir. The collar at the end of the reservoir is
The original message included these comments:
I keep getting false warning messages ‘brake fluid low’
and ‘coolant low’ and find that they are not. Anyone actually had
this problem and how did you fix it?
Pete Peterson 70E(193K) XJ40s(88-270K,89-97K, 94-122K)
Severna Park, Maryland, United States
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