keg1 Posted May 7, 2016 Share Posted May 7, 2016 Anyone have wiring diagram or tell me how to wire in a clutch pedal switch on a 85 r model. Quote Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/ Share on other sites More sharing options...
masterwelder Posted May 7, 2016 Share Posted May 7, 2016 If it's a Jake I think there a diagrams on there website. Quote Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/#findComment-332544 Share on other sites More sharing options...
keg1 Posted May 7, 2016 Author Share Posted May 7, 2016 4 minutes ago, masterwelder said: If it's a Jake I think there a diagrams on there website. Its a dynatard but i would think it would be the same. I had my 89 changed to a jake and they used the same switches but i didn't pay attention to how they were wired. Im thinking to wire it in between the pump and the dash switch? Quote Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/#findComment-332545 Share on other sites More sharing options...
Timmyb Posted May 7, 2016 Share Posted May 7, 2016 Without the diagram i would do it like you suggested. Its just an inline switch isn't it? Circuit is open when pedal is pressed? Quote Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/#findComment-332556 Share on other sites More sharing options...
fjh Posted May 7, 2016 Share Posted May 7, 2016 Dynatard was run from a relay via the governor housing no clutch switch! You will need remove the wire at the dash switch and run a wire from the dash switch down to the pedal switch and back to the wire that you remove from the dash switch! Im not sure if it operates to ground or is powered however this should still work for ya! Quote Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/#findComment-332562 Share on other sites More sharing options...
j hancock Posted May 7, 2016 Share Posted May 7, 2016 Here is a Dynatard diagram out of a 1979 Mack Service Manual for the R model. The wire listed as 16RG3 comes from the dash switch. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/#findComment-332563 Share on other sites More sharing options...
keg1 Posted May 7, 2016 Author Share Posted May 7, 2016 Thanks everyone. Thats what i thought just wanted to make sure. My 89 had the Dynatard and someone must have added the clutch switch. I had a jake put on it when i had the motor rebuilt but i never checked how it was wired. Quote Link to comment https://www.bigmacktrucks.com/topic/45108-jake-brake-switch/#findComment-332580 Share on other sites More sharing options...
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