Thanks, all. I found the exact Kaehler part at Autozone by searching for "Kaehler Digifant Relay".  I will report back when it comes in tomorrow. 

The relay I bought initially was incorrect. At appears to be for a CIS car. Darn internet. 

Chris

Dnia 11.05.2017 o godz. 13:30 David Beierl <dbeierl@ATTGLOBAL.NET> napisał(a):

> The DIN circuit designation is 30 -- unswitched power, 87 -- switched
> output, 86 -- control circuit positive, 85 -- control circuit negative.
> 
> Most relays don't care if you switch the function of 30/87 and 86/85.
> However, some do.  The fridge relay in Westys is an example of both -- VAG
> used 87 for input because that particular relay has two 87 terminals in
> parallel, and they wanted to use the second one to piggyback the kitchen
> supply.  But that same relay has a diode in series with the coil, so if you
> hook 86/85 up backwards, it won't work.  This diode prevents the starter
> from energizing the relay during starting.
> 
> If relay has a diode across 30/87 it must be hooked up so the diode is
> reverse biased in operation.  Such a diode (or sometimes a resistor) is
> there to reduce arcing/contact welding when switching inductive loads.
> 
> Yrs,
> d
> 
>> On Thu, May 11, 2017 at 1:16 PM, Neil N <musomuso@gmail.com> wrote:
>> 
>> this is a LONG SHOT idea but most relays of this type have a diode or
>> resistor or similar in parallel on switch side of relay. I REALLY
>> doubt this comes into play here, but is polarity on switch side
>> important in this application?
>> 
>> If i recall, Vanagon relays typically use 85 for ground, 86 for positive.
>>