Obey_R 23 Posted May 14, 2010 (edited) How can I test if my spare rear wiper motor works? It's out of the car but as I'm not great with electrics I'm not sure which part of the relay to connect to the batt. etc. There's 3 wires going into the relay; a yellow (live), black (earth) and a blue. Then there's four going from the relay, a white, grey and two blues. When I connect the yellow and black to the car batt. there is a click from the relay but nothing moves? Thanks Edited May 14, 2010 by Obey_R Share this post Link to post Share on other sites
pug_ham 245 3 Cars Posted May 15, 2010 Plug it into your car & see if it works? I think you might need to connect both the yellow & blue to the positive from looking at the wiring diagram in Haynes. Graham. Share this post Link to post Share on other sites