Re: 5000CSTQ - Multiswitch

[DeWitt Harrison <de@aztek.com>]

Not to worry, the 3 prong multiswitch has been the standard replacement
part for a long time now. It replaces the previous flakey 4 prong part
and works great without any other change.  As near as I can tell from
Bentley, the new units no longer require the feed from fuse S12 (instrument
cluster, AutoCheck system, etc.) to provide the temperature gauge signal.
The multiswitch connector also carries connection designations as follows
together with my interpretation of the signal connections.
     __________
     |                |
     |    C    R   |
     >               |
     |          T   |
     |_________|

C (1) Temperature gauge (instrument cluster)
R (2) ECU temperature overheat safety switch (for boost limit)
        and A/C compressor shutdown
   (3) blank on new multiswitch - from fuse S12
T (4) Coolant level low or temp. over 120C warning (AutoCheck system)

On Tue, 21 Jan 1997 16:26 -0500 (EST), "Mark Pollan" wrote:
>I ordered and received from Linda a shiny, new, re-designed three prong 
>temp. sensor and am wondering how 4 wires attach to three prongs.
>
>Based on schematic that Linda sent along, this is what the 4 prongs are for:
>
>     __________
>     |                |
>     |    1     2   |
>     >               |
>     |    3     4   |
>     |_________|
>
>1-to auto check
>2-to compressor cut-out and ECU
>3-from fuse
>4-to temperature guage
>
>How do I condense the 4 wires into three prongs?