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JL8Jeff · 01-23-2011, 10:07 AM

Maybe when it's cold something is contracting(weatherstripping?) and the rear lift ajar is being detected which overrides the wiper from working. But I would you'd be seeing the rear lift indicator light going on. When it's not working, maybe have someone push in on the rear tailgate and try again. If it works, that might indicate it thinks it's open.

01-23-2011, 10:07 AM	#4
JL8Jeff Hippy Mod, Bergermeister Meisterberger, Moderator Join Date: Aug 2004 Location: Ewing Posts: 6,216 iTrader: (3)	Maybe when it's cold something is contracting(weatherstripping?) and the rear lift ajar is being detected which overrides the wiper from working. But I would you'd be seeing the rear lift indicator light going on. When it's not working, maybe have someone push in on the rear tailgate and try again. If it works, that might indicate it thinks it's open. __________________ 69 Z28 JL8 4 wheel disc brakes - being restored 09 Silverado Z71 Last edited by JL8Jeff; 01-23-2011 at 10:08 AM.