Jump to content

Recommended Posts

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 rd688s

350hp

Share this post


Link to post
Share on other sites

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 that

check fuses/circuit breakers.

Share this post


Link to post
Share on other sites

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...

Share this post


Link to post
Share on other sites

red is that the 2 wire or 1 wire sw. in top rad.tank?

Share this post


Link to post
Share on other sites

Is the low coolant sensor float stuck? For that matter does it have a float?

Share this post


Link to post
Share on other sites

Two wire ...and no float just the sensor that treads into the coolant tank

Share this post


Link to post
Share on other sites

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 .

Share this post


Link to post
Share on other sites

OK thanks I will trace it ..

Share this post


Link to post
Share on other sites

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!!

  • Like 1

Share this post


Link to post
Share on other sites

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?

Share this post


Link to post
Share on other sites

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.

  • Like 1

Share this post


Link to post
Share on other sites

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 .

Share this post


Link to post
Share on other sites

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.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...