No WTS Light. Most likely causes? - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 08-02-2014, 12:47 PM Thread Starter
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No WTS Light. Most likely causes?

So today, I got in my truck, turned the key, no WTS light. The truck runs and operates perfectly.

Nothing seems to change other than the fact that the light no longer illuminates. What should I check first? Is it most likely a bulb?

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post #2 of 9 Old 08-02-2014, 01:39 PM
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Yea. I would think so...

Either that or some connection to it. Possibly could the PCM have a problem? I mean, when "stone cold" in the morning, I would verify the Glow Plugs were coming on despite the lack of a light (before Winter gets here!)
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post #3 of 9 Old 08-02-2014, 02:07 PM
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Well if it is the bulb, it's not that hard too change. I just took my dash apart because the area around the tac and speedo was dark driving me crazy, the only thing was I bought the tool to remove the stereo because there are 2 screw's that hold the dash cover in place. After getting that out of the way it's 4 bolt's that holds the dash cluster in place, then there is 3 harnesses that plug into the back, and the tricky part is unclipping the gear shift indicator. But all the bulbs just plug into the back and they are all marked for the location so you know exactly which one is which.

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post #4 of 9 Old 08-02-2014, 04:47 PM Thread Starter
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Checked all my fuses, they're fine. Checked the GPR, it's operating correctly. It has to be a bulb, or a wire going to it. I'll go to the Auto parts store tomorrow and buy some of those stereo removal tools and may as well buy a bulb while I'm at it.

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post #5 of 9 Old 08-03-2014, 11:21 AM Thread Starter
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And the WTS light just started working again, out of nowhere. Odd. Guess I won't worry about it.

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post #6 of 9 Old 08-03-2014, 12:19 PM
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'Till it goes away again....

Sounds like nothing to really worry about, it's not giving you any valuable information anyway. The WTS is just a timer and no indication of much at all.
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post #7 of 9 Old 12-19-2015, 04:31 PM
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My WTS light is not working either - it never has since I bought it back in May - but now that it is cold, it is obvious that there is something wrong since it took me 20 minutes to start the truck in 35 degree weather. I'll check the bulb and run the gpr test, but I have to get to the bottom of the problem. The dash lights on my late 99 are in slightly different places than the early 99?? I can't see where the wait to start light should be......

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post #8 of 9 Old 12-19-2015, 07:07 PM
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I have a cluster illumination bulb that does the same thing...Has a mind of it's own LOL...Usually doesn't come on right away but once I'm driving it comes to life.

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post #9 of 9 Old 12-19-2015, 10:07 PM
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The bulb might be barely in so it shakes in and out of contact?? Just thinking out loud

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