Bounty Hunter Posted November 23, 2010 Share Posted November 23, 2010 Chasing down a wiring gremlin in my '89 MJ 2.5L, trying to diagnose an inoperable heater blower. I've had the blower motor out and it works fine when 12v is applied. Here's my ref material: http://www.bteventures.com//mj1988electricalmanual.pdf I tested the positive lead to the blower at the blower and it showed around .7v and I tested the ground at the same location and it seemed fine. I jumped straight to the fuse panel beneath the dash and tested the blower feed. .7v at this location as well. I tested the two other items on the same circuit and the radio feed tested at .7v and the turn/BU feed tested fine at 12.5v. Any ideas as to why I'd have 2 different voltages between the 3 items on the same circuit? I'm not very experienced diagnosing electrical problems so all help would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
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