The switch is the bad link in the chain.   There is also a good chance it is the original switch.   

The reverse lights were working on our trip home from Calgary ... at least as far as Thunder Bay (the last place I recall using them at night) and have quite sometime in the past 3-weeks.  I'll try to source one locally today (a trip to G�nter).

Roy

On 08-Sep-2014, at 02:01, SDF ( aka ;jim lahey' - Scott ) wrote:

> 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
>>> 
>>