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PeteyPathy

Interlock switch

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Can anyone tell me what the switch marked "INTERLOCK" on dash to the right of steering column, and below emergency flashers is supposed to do?

 

When I push it the fuel light and brake light come on. Don't notice any other affect. Anyone have the original owner manual for an 87?

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It bypasses the clutch safety, allowing you to start the truck by holding the switch in instead of the clutch pedal.

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^ there's your answer in the nicest plainest way possible without people screaming 'search' :lol:

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just don't try it with the tranny in gear :rofl: :rofl:

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He will, eventually. My D720 had no such ignition override and no matter how careful I was, I lurched it with the starter several times a year. Never hit anything, but still...

A great way to move a non-running vehicle a short distance though. :D

 

B

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I chased every thread I could find that mentions owner manuals, only newer manuals are online appears, FSM wiring diagram doesn't tell purpose just where wires connect.

 

No I won't bump start it unless i have to because of hyd clutch failure. Not only am I mechanic (the kind who turns wrenches for a living) I'm also CDL driver so accustomed to vehicles that don't have clutch interlock. I've owned several vehicles that clutch switch failed in so i just jumped it instead of replacing.

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@Rebel thank you for the info.

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Bypassing instead of replacing? You must be ASE certified! :rofl: (calm down it's just a joke, as was my previous comment, though there are a few threads that a search of the word "interlock " will bring up and have given you the needed info as well :aok: )

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I'd add that I think it's odd that the brake and fuel light comes on when you trip the switch. Never seen that before, maybe it's just my truck.

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Yes, bypassing cause I'm accustomed to not having one. What's really bad is driving tired, shifting out then looking for 6th.. Not good to hit reverse at 70 lol

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There is no telling... PO screwed all kinds of stuff up on this thing. I'm fixing stuff as I find it.

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What's really bad is driving tired, shifting out then looking for 6th.. Not good to hit reverse at 70 lol

That and the invisible clutch when you're in an automatic...

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Back in the 80s they were having failure problems with the interlock relay, sometimes you could tap on it with a screwdriver

or something and it would work, other times we made a temp jumper wire with 10 gauge and 2 male spade connectors I have 1 in the wife's 94 pathy.

It seemed like we were having more problems with the Sentras then any other model

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