Hey guy's , my "wait to start " indicator quit working a couple days ago. No apparent performance issues, the grid heaters are still cycling like normal ( I can see the voltage pull down a few times when I first light it up). No other apparent engine related symptoms, starts and runs just like she should. 

    The only issues I have with it is one of the rear power door locks ceased to function, and occasionally the shift indicator doesnt fully recognize it's in park and sounds the horn when I open the door I just tap the shifter up towards park and that takes care of it so I'm assuming it just needs adjusted.

 Anyone have any ideas of where to start looking? i did the self test on it and came up with these codes:

, 282

S 121

C 447

HR 2988

 

I'm having a little trouble matching them up with anything relevant to this truck or problem? Any help you might have sure would be appreciated!!

Whats your ambient temps?

Upper 40's in the AM, 60-70 daytime temps. it doesn't come on even when I initially turn the key forward. In the past,It always came on with the other lights for a few seconds during the indicator lamp check , regardless of the temp ..

Light bulb could be burned out

That's what I had hoped, but it lit up when I did the key/tripmeter self test for fault codes. Doesn't light up at any other time..

I should add that I got those codes by holding the tripmeter in and turning on the key..I haven't been able to get any codes by doing the " on-off-on-off-on " method?

Can you pull codes on a 3rd gen with the key trick? I thought that was just a 2nd gen thing.

Ok i missed that it worked with the cluster test.

And the key trick works on the 3rd gen. You only have to go back one click not all the way off. And some pickups i noticed didnt work with the door open for some reason

Edited July 15, 201411 yr by mopartechnician

Yesterday afternoon I disconnected the batteries for 30 minutes and loosened/tightened the ground lead to the ECM and when I started it this afternoon it came on as usual. Hopefully that took care of it , I'll pull the ground lead off and clean it for good measure.

The 06's won't run the WTS light if intake air temp is above 66°F, my dads can run it once on a cold morning and then not again all day. His grids still cycle, just no light on warm starts. If the engine is warm and it's only shutoff for 8-10 hours and the ambient temp doesn't spend long below 66° the WTS light may not come on.

My 05 runs it every time before starting, sometimes only for 1 second.

I would guess it's normal, you just have never noticed before.

I also seem to recall the 06's don't run the WIF light as a bulb test on startup.

Temps are more than cool enough, it's been in the 40's at night here, high of 55 today lol.. Its always came on briefly with the light check when you turn the key on ,hopefully it was just a glitch and disconnecting the battery fixed it.

Edited July 15, 201411 yr by sngsht

WOW! Where do you live? Arctic circle?

Hahahaha feels like it ! Northern Michigan..When I first moved up here, I was completely off grid for about 6 weeks, everyone said there's no way your truck is gonna start in the mornings. This Cummins lit right up every morning, in temps as low as 23 below... Blew the power stroke guys at work away. Lol

Edited July 16, 201411 yr by sngsht

 This Cummins lit right up every morning, in temps as low as 23 below... Blew the power stroke guys at work away. Lol

 

Yet those Ford guys still get on their knees and pay homage to the blue oval..............................while secretly wishing they had a 

Cummins under the hood!!

Temps are more than cool enough, it's been in the 40's at night here, high of 55 today lol.. Its always came on briefly with the light check when you turn the key on ,hopefully it was just a glitch and disconnecting the battery fixed it.

Hmmm, so far I haven't seem any other 06's that so a bulb check at every key on.

You could have a IAT sensor issue? Telling the ECM the motor is warmer than it is.

If it returns I highly suggest a ultra gauge to help trouble shoot, cheap and lots of info.

Hmmm, so far I haven't seem any other 06's that so a bulb check at every key on.

You could have a IAT sensor issue? Telling the ECM the motor is warmer than it is.

If it returns I highly suggest a ultra gauge to help trouble shoot, cheap and lots of info.

 

 

My '04.5 WTSL comes on each time I turn the key....................just depends on outside ambient temperature or the engine temperature as to how long it stays on.

My '04.5 WTSL comes on each time I turn the key....................just depends on outside ambient temperature or the engine temperature as to how long it stays on.

Just like my 05, it's the 06's that are different.

Well the "fix" didn't last long - 15-20 starts and it quit working again. 43 degrees ambient temp this morning and no light, the heaters definitely cycle after it starts, but  I guess I can't say 100% that they are working when I turn the key forward  initially.  The voltmeter pulls way down when I turn the key and it starts pretty much instantly so I'm guessing that they must be cycling with the key- just no indicator.

 I guess I'll have to look into the ultra gauge AH-64..  Hoping I don't have a ECM issue, I read a couple threads

in another forum suggesting that this is a early indicator that the ECM is failing . I'm not sure that pertains necessarily to the '06's though since these were  2nd gen threads I believe..

An ultra gauge will tell you if you have a MAP or IAT sensor on the fritz.

I have one on the way   Thanks for the tip !