66 Series Farmer Posted March 19, 2022 Share Posted March 19, 2022 On my 5088 the front two cab hazard flashers both work and both work with their respective turn signal direction. Neither of the two rear ones work. I have taken both of the bulbs out and both appear to be fine. I have even switched one of the front working bulbs to the back with no change. Last fall when I was testing everything, I could get my test light to light up on the rear wires but it was constant and not flashing. What I have done so far is changed out the flasher unit under the dash with a new one from Mike at Triple R. Was really hoping this was going to fix it but it didn't make a difference. I still need to check the rear outlet plug to see if I plugged an implement into if the flasher has power back to it. Any ideas where to check next? From previous post it sounds like their is a connector under the upper fuel tank that goes to the top of the cab. I'm still a little confused how I was getting power to my test light but it was constant and not flashing. Quote Link to comment Share on other sites More sharing options...
Weapon Posted March 19, 2022 Share Posted March 19, 2022 Sounds like you’ve lost your ground to those lights. Yes there is a connector under the fuel tank and near impossible to get to. John 1 Quote Link to comment Share on other sites More sharing options...
66 Series Farmer Posted March 19, 2022 Author Share Posted March 19, 2022 I would agree John. If I remember correctly I was grounding the test light to the cab frame. Is there a common ground point for the rear lights under one of the fenders by chance. I don’t have any access to a wiring diagram. Quote Link to comment Share on other sites More sharing options...
Reichow7120 Posted March 19, 2022 Share Posted March 19, 2022 I second the ground issue. Last summer we bought a our 7230 Magnum. Same issue fronts worked no rears. Ended up being the ground. Cleaned it up and all was good Quote Link to comment Share on other sites More sharing options...
IHC5488 Posted March 19, 2022 Share Posted March 19, 2022 Flashers grounds are tapped onto the red cab shell near the rear air filter inside. For some reason I think the front and rear flashers hot wires are bugged together in the cab roof Quote Link to comment Share on other sites More sharing options...
66 Series Farmer Posted March 19, 2022 Author Share Posted March 19, 2022 Thanks guys. I need to blow out the cab filter so I’ll have to do some exploring this weekend and try to trace some wires inside the cab. Quote Link to comment Share on other sites More sharing options...
FarmerFixEmUp Posted March 19, 2022 Share Posted March 19, 2022 The dome light on my 5288 stopped working with the door switch. Took cab roof panel off and mice had chewed off the wire to the light. Little $%&holes get up the roll bar and have at it. Plugged the tube and no more problems. Might want to check that out. Quote Link to comment Share on other sites More sharing options...
66 Series Farmer Posted March 21, 2022 Author Share Posted March 21, 2022 Just a quick update. I had time to look around today. Used a jumper wire to the cab and the flashers started working. Weird thing was once I did it to the right one it stay working even after I removed the little jumper wire. I had moved a bunch of wires around under fender but still can’t figure that one out. Regardless i ran a new ground wire to both of the rear flashers and ground it to the cab shell and all is fine. I appreciate everyone’s help. 1 Quote Link to comment Share on other sites More sharing options...
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