Re: Multifunction Switch/Sensor II

[Bill Payne <srfntrtl@bellsouth.net>]

JordanVw@aol.com wrote:

> In a message dated 9/2/99 6:51:02 PM Eastern Daylight Time, cjr1@gte.net
> writes:
>
> << >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.
>
> chris
> '86 5kT, TQ

I unplugged the sensor and the light still stayed on in the autocheck display.
does that mean that I have a "printed circuit board problem" behind the instrument
cluster?  Also, does anyone know if the circuit boards are interchangeable between
my '91 CQ 20v and any other vehicles?Thanks again

Bill Payne
Raleigh, NC