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Re: Multifunction Switch/Sensor
In a message dated 9/2/99 6:51:02 PM Eastern Daylight Time, firstname.lastname@example.org
<< >I also have an unusual problem with my autocheck light system.
>About 30 seconds after startup, my coolant temp/level light goes on and
>stays on for the duration. I unplugged the multifunction switch from
>the sender at the top of the head, and it still shines brightly (only
>now the coolant guage will not work).
1. Coolant level is low;
2. Coolant level sensor in overflow tank is bad; or,
3. Multifunction switch/sensor is bad.
#3 is most likely, assuming all wiring connections are good. These switches
seem to fail regularly. They go for ~$50.
i just replaced the multifunction sensor in my '86 5kTQ. i had the same prob
as you, the coolant level warning light was coming on 30 secs after i started
the car.. i went thru 2 good used overflow tanks before i got smart and
replaced the multifunction sensor switch. took less than 5 minits to replace.
'86 5kT, TQ