eaglescout526 Posted September 7, 2019 Share Posted September 7, 2019 Has anyone ever had cruise control just stop working? I go to engage it one day as I was driving home and I smelt an electrical burning smell. I have replaced everything(including wiring harness) with a spare set I had. I did get it to engage for maybe a minute with the old regulator but now nothing. I have done the FSM adjustment and it engages for a second and it stops operating. I have vacuum where I need it to be and I am getting vacuum from the cannister. Anyone just run into this and be baffled by why it won't engage? Does anyone have the dealer tool? AM PC-1-R? Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted September 8, 2019 Share Posted September 8, 2019 Have you tested the brake light switch? I could be wrong but pretty sure the renix cruise has a dual prong setup for cruise which would make sense since the brake cancels the speed setting. If that goes bad I bet you would smell something. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 8, 2019 Author Share Posted September 8, 2019 I’ve tested both factory and aftermarket switch. I’m gonna look into my vacuum harness on the engine side tomorrow. I put hell of a battle up today just electrically. Seems like everything functions as it should. Don’t know if the regulators(computers) do. Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted September 8, 2019 Share Posted September 8, 2019 I'd lean towards the yellow trim box next. I have about a half dozen of them. No clue if any of them work. I'd like to setup cruise on a build when I start soon hopefully but Renix cruise just seems like a complete pia. Like literally makes me ask myself "why on earth am I using Renix as I'm starting over when I have h.o. everything to?" So that's kinda my lazy logic at this point giving up on restoration to original and do what I want. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 8, 2019 Author Share Posted September 8, 2019 Yup. I keep testing them with the pots in different positions. H.O. Won’t work with Renix sadly. H.O. Computer has cruise built in so it’s plug and play. Renix cruise isn’t a PITA, well installing it is but once it’s in there and some fine adjustments it’s awesome to have. I’ve just never heard or have cruise just lay down and die until now. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 8, 2019 Author Share Posted September 8, 2019 (two hours ago)Well damn...I blew something on the regulator. Plugged in the old regulator after doing some adjustments and poof a plume of smoke. Did some tracing on the board to the wiring after I got home and found it is the white wire that leads to the servo. Servo bad? I don't know. All I know is that it has Ohm resistance that is less than infinite according to the FSM. Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted September 8, 2019 Share Posted September 8, 2019 7 hours ago, eaglescout526 said: Yup. I keep testing them with the pots in different positions. H.O. Won’t work with Renix sadly. H.O. Computer has cruise built in so it’s plug and play. Renix cruise isn’t a PITA, well installing it is but once it’s in there and some fine adjustments it’s awesome to have. I’ve just never heard or have cruise just lay down and die until now. I think you misunderstood. I could go either complete ho setup or renix. So I meant why bother with a renix setup if I have both to choose from in front of me. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 9, 2019 Author Share Posted September 9, 2019 1 hour ago, saveevryjp1998 said: I think you misunderstood. I could go either complete ho setup or renix. So I meant why bother with a renix setup if I have both to choose from in front of me. Oh, yes that makes more sense. Link to comment Share on other sites More sharing options...
omega_rugal Posted September 9, 2019 Share Posted September 9, 2019 i thought Renix era cruise were electronic, mine had a square box with an electric motor inside... Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 9, 2019 Author Share Posted September 9, 2019 53 minutes ago, omega_rugal said: i thought Renix era cruise were electronic, mine had a square box with an electric motor inside... Its an electro-vacuum set up. So far I'm at a loss. The original regulator blew a resistor. The new one just won't do a damn thing. Everything seems to be in working order but I can not tell for certain. It all worked prior to tearing out the dash to install AC. But that is it. I haven't disturbed the set up and all I did was unplug the servo from the vacuum line and unmount it to move it out of the way for the moment. The only thing I found on the dash side was the ground cable that Cruiser recommends to do was torn away from the mounting stud. That has since been repaired. Link to comment Share on other sites More sharing options...
omega_rugal Posted September 9, 2019 Share Posted September 9, 2019 mine has no vacuum stuff, all electric, i rewired it as a crude electronic throttle control, the OEM speed controls are long gone and i have a manual tranny so cruise control it´s useless for me... with this setup i accelerate, shift to top gear and lock the throttle in place, with 2 buttons for adjust + and - , pressing the brake resets the system... the only thing left to do is find a way to tune the + and - buttons: + is rather slow to increase the rpms but i have to quickly tap the - or else the throttle goes all the way down... Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 9, 2019 Author Share Posted September 9, 2019 That honestly sounds like an aftermarket kit. I think I'm gonna bet I need a new regulator. Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted September 9, 2019 Share Posted September 9, 2019 42 minutes ago, eaglescout526 said: Its an electro-vacuum set up. So far I'm at a loss. The original regulator blew a resistor. The new one just won't do a damn thing. Everything seems to be in working order but I can not tell for certain. It all worked prior to tearing out the dash to install AC. But that is it. I haven't disturbed the set up and all I did was unplug the servo from the vacuum line and unmount it to move it out of the way for the moment. The only thing I found on the dash side was the ground cable that Cruiser recommends to do was torn away from the mounting stud. That has since been repaired. Have you tested vacuum at all locations? What about at column on the stalk electrical wise. This is why renix cruise is a pia cause there is way too many parts and in mostly tight nasty places to get to especially around the feed in through firewall(another good spot for shorts or leaks). Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 9, 2019 Author Share Posted September 9, 2019 I need to get a vacuum tester and gauge, but as far as I know everything works. I have done light tests and volt tests at all electrical connections to see what does what. Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted September 9, 2019 Share Posted September 9, 2019 I'm leaning towards 3 things. It's getting triggered off due to lack of vacuum, bad brake switch(killing the set position) or the stalk itself might be causing it. I'm pretty sure there was an issue with the brake switch and had a service bulletin on it. It might be in Cruisers tips. I know I have seen plenty from 84 up that had some extra wires off the switch wired directly to the fuse panel. Some had built it fuses in between. I know this was problematic on xjs but I never had cruise so I never bothered to read further into it. Link to comment Share on other sites More sharing options...
Red Mistress Posted September 9, 2019 Share Posted September 9, 2019 AMC cruise control tester, this guy will let you borrow it. http://www.ifsja.org/forums/vb/showthread.php?t=174387 Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 9, 2019 Author Share Posted September 9, 2019 I’ll have to get in contact with him. You would think more of that tester would be around as it seems Dana was the leader in cruise control tech back in the day. Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted September 9, 2019 Share Posted September 9, 2019 I hit the link. 1 of the first thing it mentions is a fuseable link blown. I'm not sure if they all had the fuse intially in early models or if it had to be upgraded to a better configuration with that service bulletin I had mentioned stumbling upon. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 17, 2019 Author Share Posted September 17, 2019 Well I finally figured it out. After some rigorous testing of the entire circuit and swapping parts around, it boiled down to one regulator blowing a couple resistors and the other being inop. JMO sent me his old regulator that allowed me to come to this conclusion. Nice to have cruise and something functioning again. Link to comment Share on other sites More sharing options...
WahooSteeler Posted September 17, 2019 Share Posted September 17, 2019 13 minutes ago, eaglescout526 said: Well I finally figured it out. After some rigorous testing of the entire circuit and swapping parts around, it boiled down to one regulator blowing a couple resistors and the other being inop. JMO sent me his old regulator that allowed me to come to this conclusion. Nice to have cruise and something functioning again. Any more detail and/or pics of the repair? I have non-functioning cruise also and while it could certainly be one of many things, this could be good info to start with troubleshooting. Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 17, 2019 Author Share Posted September 17, 2019 9 minutes ago, WahooSteeler said: Any more detail and/or pics of the repair? I have non-functioning cruise also and while it could certainly be one of many things, this could be good info to start with troubleshooting. Actually...it’s really was a matter of swapping out the regulator(the yellow box) and testing it. There is a factory testing procedure for testing the regulator, on one side is two pots both get positioned at the ten o clock position and the third one gets turned all the way to the left. I used a test light to test the stalk and brake light functions. Link to comment Share on other sites More sharing options...
WahooSteeler Posted September 17, 2019 Share Posted September 17, 2019 Gotchya......Thanks Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 17, 2019 Author Share Posted September 17, 2019 9 minutes ago, WahooSteeler said: Gotchya......Thanks No problem. I can assist it need me. Link to comment Share on other sites More sharing options...
Minuit Posted September 17, 2019 Share Posted September 17, 2019 Wish I had time to see what's inside of one of these things and see if I could fix it Link to comment Share on other sites More sharing options...
eaglescout526 Posted September 18, 2019 Author Share Posted September 18, 2019 24 minutes ago, Minuit said: Wish I had time to see what's inside of one of these things and see if I could fix it Well when ever you find time I have my busted one that I may or may not be able to fix. Solder is a bit out of my skill but might try it if I find the right resistor needed. Link to comment Share on other sites More sharing options...
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