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Hi. I've just started a new job driving an old not much loved '90 R series Mack. Awesome old girl but the indicators stay solidly on. Where the hell is the flasher unit on these trucks pleeeeeease? I've ripped half the dash apart and looked everywhere. All I have found is the indicator relay by following the clunk sound lol. She's a good truck but been messed with plenty so the flasher probably isnt where it was but I need a start point.

Thnx Rob.

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The flasher should be in the fuse panel behind the door in the dash on the passenger side. I just had the same problem, on my rd. It turned out to be feedback from the head/marker lights into the turn signal indicators in the turn signals on the fenders. I swapped them out with new LED units, and that cleared it right up.

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