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Re: 1975 Mack R600
Posted to HD/Fleet Forum on 6/14/2006 3 Replies

Damon,

It has 1 switch and it is on the drier. Is that a binary (hi and low pressure)? Anyway, the wire on that switch is connected to pin 4 of the distribution bar on the firewall. It has no power on pin 4. I do not know if it is supposed to be there or if ... Login to read more.

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