something to consider..
whether on the used switch not working correctly,
or on a new one just installed..
is the depth of the switch into the switch housing .

the depth is adjusted with the sealing washers..
too deep and the back up lights won't shut off ,
not enough ..and they won't come on. ( or vise versa, seen it several
times, including on newly rebuilt transmissions. )

In all cases, I recommend doing ALL the testing FIRST...
then chase the part.
Is it determined for sure the switch is 'the problem' for sure ?

I've found a fair share of worn out/faulty ones.

S.

On 9/7/2014 4:38 PM, mark drillock wrote:
> Yes, later vans used a switch with a single 2 pin connector instead of
> two 1 pin connectors.  085 941 521
>
> Mark
>
>
> Roy Nicholl wrote:
>> Mark:
>>
>> I looked up that part number and the one I removed (and stuck back
>> in) looks a little different.  The connector is different - it is an
>> asymmetric plug rather than two spades.  Within the plug would be
>> spades, but I think their are orientated 90 degrees to those I see in
>> the pictures for 020 941 521A.
>>
>> Mine looks similar to:
>> http://img.eautopartscatalog.com/live/P300633921FEB.JPG
>>
>> I have read something about the 020 941 521A being used only part way
>> through the '88 model year.  With what was it replaced?
>>
>> Roy
>>
>> On 07-Sep-2014, at 22:07, mark drillock wrote:
>>
>>> 020 941 521A
>>
>