Jump to content
trimster

LED turn/clearance open circuit fault

Recommended Posts

Put in LEDs in the front turn/clearance lights on the Volvo. Now the dash computer throws an open circuit fault. Turn signal sound in the cab is fast, but the actual bulb flashing in normal.

How's this fixed? resisters? LED compliant turn signal relay?

Thanks

Share this post


Link to post
Share on other sites

Some LEDs have polarity. If these LEDs are installed backwards, they won't illuminate. If they can be inserted when turned 180º, they might work.

Share this post


Link to post
Share on other sites
10 hours ago, trimster said:

LCM programming....user do'able? Or is this a dlr thing? 

Lighting Control Module. Dealer or local mechanic with the software.

Share this post


Link to post
Share on other sites

I don’t know about the front but my rear lights sorted themselves out on their own after a few days or so.  Really they flash correctly outside so don’t be in a rush to spend money at the dealer.

 

Nigel

Share this post


Link to post
Share on other sites

Change your flasher to an electronic type instead of the one supplied.  I did the same thing on my IH 4700, and when I turned on the lights to check operation, the blinkers acter wacko.  Changed the flasher and all is good.  Circuit is looking for some load to operate the flasher and the LEDs dont have enough of a load.

Share this post


Link to post
Share on other sites

By far the easiest solution is to add a resistor across each of the LED bulbs.  As far as taking away the "advantage" of LED bulbs, the only thing the resistor does is draw a little bit of current when the LED light is on to clear the trouble code.  Not enough to worry about unless you plan on leaving your truck unattended with the flashers on for more than a day or two.

https://www.amazon.com/Zento-Deals-Pieces-Load-Resistors/dp/B01N0ZKV1R

Edited by Lou Schneider

Share this post


Link to post
Share on other sites

The resistor idea seems more involved than replacing the plug & play flasher.  I also had replaced the taillights, backup lights, fog lights and headlight.  

Share this post


Link to post
Share on other sites

So, the flasher sound in the cab is fast. The turn signals blink at a normal rate.

The open circuit error happens when you turn the key to the on position. Computer is checking stuff I guess.

Where's the flasher relay located? I'm guessing under the top dash panel where the fuses and such are.

Share this post


Link to post
Share on other sites

Generally speaking, installing aftermarket (probably chinese) LED bulbs into fixtures originally intended for incandescent bulbs results in degraded lighting performance....not to mention the electrical problems you are having. 

I'd put the normal bulbs back in (use bulb grease) and move on to the next upgrade.

 

 

 

Edited by podwerkz

Share this post


Link to post
Share on other sites

I read somewhere that the LCM will 'learn' the new conditions (might of been a u tube vid) search for a 'number of starts' or just wait a bit like Nigel suggests

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.

Loading...

RVers Online University

campgroundviews.com

Our program provides accurate individual wheel weights for your RV, toad, and tow vehicle, and will help you trim the pounds if you need to.

DFW RV Roof

RVAir The cleanest air in RVing!

Rv Share

Dish For My RV.

Find out more or sign up for Escapees RV'ers Bootcamp.

Advertise your product or service here.

The Rvers- Now Streaming

AGS Now Hiring

RV Pet Safety

RVTravel.com Logo



×
×
  • Create New...