PeteyPathy Posted April 25, 2014 Share Posted April 25, 2014 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? Link to comment Share on other sites More sharing options...
Rebel526 Posted April 25, 2014 Share Posted April 25, 2014 It bypasses the clutch safety, allowing you to start the truck by holding the switch in instead of the clutch pedal. Link to comment Share on other sites More sharing options...
nunya Posted April 25, 2014 Share Posted April 25, 2014 ^ there's your answer in the nicest plainest way possible without people screaming 'search' 1 Link to comment Share on other sites More sharing options...
vagabond Posted April 25, 2014 Share Posted April 25, 2014 just don't try it with the tranny in gear :rofl: Link to comment Share on other sites More sharing options...
Precise1 Posted April 25, 2014 Share Posted April 25, 2014 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. B Link to comment Share on other sites More sharing options...
PeteyPathy Posted April 26, 2014 Author Share Posted April 26, 2014 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. Link to comment Share on other sites More sharing options...
PeteyPathy Posted April 26, 2014 Author Share Posted April 26, 2014 @Rebel thank you for the info. Link to comment Share on other sites More sharing options...
nunya Posted April 26, 2014 Share Posted April 26, 2014 Bypassing instead of replacing? You must be ASE certified! (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 ) 1 Link to comment Share on other sites More sharing options...
Kingman Posted April 26, 2014 Share Posted April 26, 2014 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. Link to comment Share on other sites More sharing options...
PeteyPathy Posted April 26, 2014 Author Share Posted April 26, 2014 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 Link to comment Share on other sites More sharing options...
PeteyPathy Posted April 26, 2014 Author Share Posted April 26, 2014 There is no telling... PO screwed all kinds of stuff up on this thing. I'm fixing stuff as I find it. Link to comment Share on other sites More sharing options...
nunya Posted April 26, 2014 Share Posted April 26, 2014 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... Link to comment Share on other sites More sharing options...
Rebel526 Posted April 26, 2014 Share Posted April 26, 2014 No problem, Pete. Glad to help Link to comment Share on other sites More sharing options...
vagabond Posted April 27, 2014 Share Posted April 27, 2014 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 Link to comment Share on other sites More sharing options...
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