From this Ebay listing, it sounds like they do not interchange: Toyota 4Runner POWER REAR DOOR WINDOW CONTROL 85930-89105 Relay MODULE 1991-1995 | eBay - https://www.ebay.com/itm/384165404390
"On 1991 models you MUST verify which box you have. 1991 models used two different ones which DO NOT...
Is there any difference between 85930-89103 and 85930-89105?
One is supposed to be for '90-'91, the other, '91-'95. Will the newer one work on a '90? The newer ones are a little cheaper. I don't know if one is actually not compatible with the other.
I tried to clean the relay contacts, but no...