CAT 7155 Back-up switch, where is it

[crownfire]

I'm working on my M917 and can't get the back-up lights or alarm to work. The switch is in the correct position and seems to work however, there is no power to either side of the switch with the transmission in reverse. Does anyone know where the transmission switch is? I thought it may be in the shifting mechanism console. I can see that there is a switch in there but I'm not sure what it's for. Thanks for your help.

 

[R Racing]

Its on the transmission

 

[NSCoyote]

IIRC there is a "back up alarm overide" switch on the dash, check to make sure that it is not in the active position

 

[NSCoyote]

here we go

 

[crownfire]

Thanks for the reply. The overide switch is in the correct position so I think the transmission switch is the problem.

 

[NSCoyote]

i dont have the manuals in front of me but i will have a look after supper and see if i can find a wiring schematic of the back up alarm/light circut from the trans to the alarm/light, as well as the location of the main trigger switch

 

[eldgenb]

this would be useful, my 920 has the same issue and I have just not investigated it yet.

 

[R Racing]

The reverse Switch is on the trans head between the umbilical cord and trans pressure regulator. you can access it thru the panel in the floor . its a air pressure switch with 2 wires coming off of it. I hope this helps.