Seat heater switches

[Joe Yakubik <75363.2524@compuserve.com>]

Ray writes about his trials and tribulations with his seat heater switch:

A few additions:

To remove the switch:  Gently prying off the switch cover, then GENTLY using a
pair of needle nose pliers works great.  There is not a lot of slack in the
wiring harness.  Brute force is strongly discouraged.

Replacing the bulb:  Radio Shack 12 V DC, 60 mA.  Fits perfectly.

Rebuilding:  Don't forget the little black spring clips.

I am a little confused by his "burning out the rheostat" though.  The rheostat
is, as near as I can tell, the black arc on the circuit board.  It's hard to
imagine that twelve volts across the wrong terminals would destroy this.  Ray:
Have you checked the thin metal arcs on the wheel?  It is possible these could
be bent and are causing your switch to malfunction.  

FYI:  Pin outs:  pin 3 = +12v to light bulb, pin 5 = gnd for bulb, pin 6 = +12v
to rheostat, pins 2 and 4 are outputs to control unit.  Light bulb function is
NOT an indication of switch/circuit 
functionality.

Joe Yakubik