R.E.D Posted June 29, 2014 Share Posted June 29, 2014 So I finally got all the dash lights in the RD working and noticed the lightening bolt on with Code 1-7 , which should be low coolant level.After checking the coolant tank and refilling it the light still remains.I disconnected the low coolant sensor and used a wire to complete the circuit but light still on.There seems to be no voltage in the connector whatsoever and I have traced the cable and can see no damage to it.So now what?Does this affect my engine performance?96 rd688s350hp Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/ Share on other sites More sharing options...
hatcity Posted June 29, 2014 Share Posted June 29, 2014 it won't derate the motor, but the shutdown indicator may come on. You can over ride the shutdown, but you may have a big problem doing thatcheck fuses/circuit breakers. Quote Success is only a stones throw away.................................................................for a Palestinian Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-250910 Share on other sites More sharing options...
R.E.D Posted June 29, 2014 Author Share Posted June 29, 2014 all fuses look good and yes the shutdown light is on constantly ? I been working like that but it just bugs the crap out of me having the light lit.....AND YES I could disconnect the bulbs but ill know its still there..still bugs me... Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-250917 Share on other sites More sharing options...
gearhead204 Posted June 29, 2014 Share Posted June 29, 2014 red is that the 2 wire or 1 wire sw. in top rad.tank? Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-250939 Share on other sites More sharing options...
41chevy Posted June 29, 2014 Share Posted June 29, 2014 Is the low coolant sensor float stuck? For that matter does it have a float? Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-250977 Share on other sites More sharing options...
R.E.D Posted June 29, 2014 Author Share Posted June 29, 2014 Two wire ...and no float just the sensor that treads into the coolant tank Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-251016 Share on other sites More sharing options...
staxx Posted June 30, 2014 Share Posted June 30, 2014 If this is a vmac 2 setup pin A at sensor should have 5 volts pin B should go to ground . The 5 volts comes from J1A connector at vmac module this is connector all the way on rite pin F3 at module goes to pin A at sensor this is your 5 volt wire. Good Luck . Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-251036 Share on other sites More sharing options...
R.E.D Posted June 30, 2014 Author Share Posted June 30, 2014 OK thanks I will trace it .. Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-251095 Share on other sites More sharing options...
R.E.D Posted June 30, 2014 Author Share Posted June 30, 2014 I used a voltmeter and I got 4.6 volts...as soon as I grounded pin B..light went off..Easy fix...thanks for the help you guys ...One more thing of the list!! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-251162 Share on other sites More sharing options...
Frmconcrete09 Posted January 7, 2015 Share Posted January 7, 2015 Hi guys, I've got the same problem on a 00 rd690 . I've replaced the sensor and also used a piece of wire and jumped the plug but the light and buzzer continue to stay on. Today i checked the voltage to the plug and have nothing. Also what do you mean by pin a and b ? Are you speaking of each wire? Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-273433 Share on other sites More sharing options...
gearhead204 Posted January 7, 2015 Share Posted January 7, 2015 I'm not up on vmac but if the shut down is like the older r mods both oil psi and coolant level will light the lamp. if ii understand the prior post the coolant sensor is a 2 wire connector one is ground the other should have 5 volts. so if you have no power you need to chase out that wire to find the problem ( busted, corroded, or shorted) if it checks out ok you would need to check the oil psi safety sw. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-273437 Share on other sites More sharing options...
Frmconcrete09 Posted January 7, 2015 Share Posted January 7, 2015 Actually I guess I should add that I also replaced the oil pressure sensor because the other day as soon as I started it I got the code 1-1 for low oil pressure and the truck kinda went into a rough idle , so I pressed the accelerator a bit as to keep it running and it leveled out and ran fine . After that the buzzer/ lights both went off . That was the only time it ever threw code 1-1 So we replaced both sensors to be safe, but now the truck still has the code 1-7 everyday . I will check the wires again , but I see no place they could be troubled as they are wrapped in loom and then run into the bigger harness . Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-273440 Share on other sites More sharing options...
Keffer inc Posted January 20, 2015 Share Posted January 20, 2015 Wire insulation could have rubbed together raw against another wire, never know. I would make sure the ground is good, check all fuses related to that sensor, then Chase wires ad the last step. Quote Link to comment https://www.bigmacktrucks.com/topic/36180-so-now-what/#findComment-275175 Share on other sites More sharing options...
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