i picked up a new wiper motor for my 85 z28 from the junk yard from a v6 85 camaro in good condition. got home an went to switch covers an there different inside. both had same controls delay etc hook ups. but my cover is full of circuitry, an the new has none an wont work on my car, what is up with these why different?

 

Do both have delay wipers? That might be the reason.

 

as i posted both had same controls delay an such

 

is no guarantee that the donor car still has the same steering column and wiper motor that it did when it rolled off the general motors assembly line.