When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
First - thank you all for your continued attention. I realize my info has been a bit all over the place, so let me summarize:
Symptoms:
- Parasitic Drain - Gone
- Dies while driving - Rare occurrence, potentially fixed? Not easily reproduced...
- No start - Confirmed, still exists
Things done:
- Replaced FPDM
- Replaced Ignition Switch
- Replaced Alternator
- Replaced Battery
- Replaced Body Security Module (BSM) - truck has history of leaking from both 3rd brake light & rear window. Both leaks fixed prior to BSM replacement.
- Replaced Starter Relay (twice)
- Checked some grounds, not all
Things still on the to-do list:
- When no start happens, if I pull/replace relay, truck starts. Need to get behind the fuse box and take a peek. Interesting video I watched on the RY116 relay is that it's a diverse switch, and the center pin is for shutting things off...not even sure the ignition circuit is using the center pin? This was the suspected loose pin, by the way...
- Wasn't tracking the ground on the rear axle - it's too easy not to clean as a precautionary so I will...
- There IS a lot of corrosion on the starter, so while apparently an unlikely candidate..probably a problem waiting to happen.
- Acknowledge the transmission range selector issue, along with the neutral safety switch. Tired of throwing parts though, so hesitant to continue to do so...
Next step, pull fuse panel out and see if I can take a peek without unplugging the copious amounts of wire bundles..but if required, c'est la vie. More to come...
Thank you for your help! Custody "battle" appears to be restarting in the near-future (in my eyes protecting my daughter, she's been with me for 2yrs now...for good reason)..need to be conservative with funds.
C_
take (rule out) the low hanging fruit. Search “grounds checklist” you should find complete list of grounds. There is one on back panel of cab (behind seat), many in engine compartment, and one (or twi?) near/under both kick panels. Also do battery/starter cables. It very well may NOT be grounds, but they are important and easy.
Bottom Line Up Front:Truck will occasionally not start. The systems power up, but when I go to crank...nothing (to include no sounds).
Confirming that today's "no-start" is the same as the original no-start. Everything normal when key is turned to Run, but nothing happens when you turn the ley to Start.
Sorry for the multiple posts, I was trying to copy and paste some text but it copied the photos instead and then I could not erase it.
In regards to the relay's center slot in the fuse box (CJB).
I took a look at an old CJB (source unknown but confirmed as Ford) that I had laying around and noted that the center slot for the relay is not used.
You might want to take a picture of your CJB and confirm the center slot is not used. If yours is not used then there is no concern with sloppy fit for the center post.
Sorry for the multiple posts, I was trying to copy and paste some text but it copied the photos instead and then I could not erase it.
In regards to the relay's center slot in the fuse box (CJB).
I took a look at an old CJB (source unknown but confirmed as Ford) that I had laying around and noted that the center slot for the relay is not used.
You might want to take a picture of your CJB and confirm the center slot is not used. If yours is not used then there is no concern with sloppy fit for the center post.
take (rule out) the low hanging fruit. Search “grounds checklist” you should find complete list of grounds. There is one on back panel of cab (behind seat), many in engine compartment, and one (or twi?) near/under both kick panels. Also do battery/starter cables. It very well may NOT be grounds, but they are important and easy.
I've been unsuccessful in finding in the past (apparently 17 locations). If someone has that or a link handy, much appreciated. Otherwise the search continues... Curious, if it is a grounding issue...is there a scenario where removing & replacing the starter relay would temporarily fix the fault?
Originally Posted by BareBonesXL
Confirming that today's "no-start" is the same as the original no-start. Everything normal when key is turned to Run, but nothing happens when you turn the ley to Start.
Correct, same symptoms. Everything turns on, but when I go to crank...nothing.
Originally Posted by Jimboy
Thanks! I think we can rule out the center pin (87a). I also looked at the transmission range selector, maybe a light dusting of corrosion but nothing significant. Just ordered a motorcraft replacement from rock auto, they're loving me right now.
Last edited by callaway29; 07-19-2022 at 03:38 PM.
I've been unsuccessful in finding in the past (apparently 17 locations). If someone has that or a link handy, much appreciated. Otherwise the search continues... Curious, if it is a grounding issue...is there a scenario where removing & replacing the starter relay would temporarily fix .
did you see this recap of locations?
Originally Posted by laterongc
Firewall 2, rt fender 2, left fender, starter, and behind rt headlight/radiator.
Left pillar 2, right pillar 2, left rear/wall 2, under dash near brake controller, and under console.
I think that the solution path might be in Jimboy's wiring diagram. The PCM provides the ground that allows the starter relay to close. It seems like either the PCM is not providing the ground or the range sensor is not passing the current through to the relay or the starter relay is not passing the current.
You can narrow the problem down by measuring voltage at the output pin of the range sensor when you turn the key to Start. If you see voltage at the output of the range sensor then it's either not making it through the relay circuit to the PCM or the PCM is not providing the ground needed to actuate the relay. A meter or test light should be enough to get you closer. Follow the current.
Is this website ever a little wonky? It keeps jumping all over the place and I can't seem to do multi-quote right now.
BareBonesXL - While I'd love to test first, with it being intermittent, I think I'd have to wait for a fault in order to test...which doesn't always happen at the most convenient times. That said, and with it being a highly problematic component, I ordered a motorcraft replacement (I edited my previous post where I expressed hesitancy). I also ordered a new bushing for my shift linkage since I noticed it's practically non-existent. If the opportunity presents itself though I'll do what you recommended (man I hope it's not the PCM, I seem to recall those are expensive).
laterongc - I did find that, and then lost it. I'll use it, thanks. Just cleaned up the two grounds in the rear which weren't great (rust). Will continue to hunt and clean them as time permits....
Last edited by callaway29; 07-19-2022 at 04:20 PM.
07-18-2022, 07:07 PM
