Question about 2005 Isuzu Ascender
I assume that you have a trailer light attachment installed at the rear of the vehicle somewhere around the tow hitch,turn on your head lights,obtain a volt meter and check D.C. voltage on the pigtail,ground the black lead to clean frame metal and check the pins on the plug with the red lead,one of them should be live 12v dc.that will be your trailer running lights,theother will be brake lights,you will have to have someone hold trheir foot on the brake to test it,dont assume the trailer is ok. verify voltage at the connector on the vehicle first,if you have 12 v,there the trailer has the problem,or if it hasnt been used in a long time the connector may need to be cleaned,as far as the fuse goes depending how it was installed,could be several choices,set your meter on continuity and check all fuses,you dont have to phisically remove each one,if you look close there are two small contact points on both sides of the amp rating number,most likely you will have two or three fuse panel locations,primary is under dash drivers side ,secondary panels and relays located in engine compartment under hood on fender walls black plastic box w/cover,,also may be on the sides of the dash board,can only see when the door is open ,or behind the ashtray in the center console,replace any fuses that are blown,be aware of the plug configuration on the car to the trailer,and that the ground wire on the car side of the plug is also the ground lead on the trailer connector, wires may have got mixed up during repair,happens to the best of us once in a while,clean ground connections are very important on trailers,old rusty wires and scerws should be removed wire brushed and reinstalled,or replaced if needed,then sealed with varnaloc,or spray paint,to protect them,hope this helps you.aloha from maui todd0708
Posted on Oct 01, 2009
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Posted on Jan 02, 2017
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Replace the AIR pump AND one-way check valve
Test and clean the AIR pump AND test and replace the one-way air check valve
Replace the AIR pump inlet hose
Replace the AIR pump fuse (found under the hood)
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