Hello Megan Prendergast,
A bit on the cryptic side... No year, make... Model...
Sans even a clue as to the position control
DEFROST... problem description
(yes: a possibility on some cars... a biggie in FARGO).
A rash assumption on my part... but lets... us guess we are talking about USA Market
One could find FREE circuit drawings for "MOST"
North American vehicles on the BBB Industries site(plus TECHNIACL SERVICE BULLETINS (TSB
registration is required because these are REAL
BBB Industries Premium Alternators Starters Power Steering Products
help us help you... toss in a couple of clues
Carnac the Magnificent