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H3T No Start

Mr_Rich

Mr_Rich

Well-Known Member
Messages
667
Location
Yucaipa & Santa Maria
I posted previously about a no-start condition I had last week when I stopped for an evening errand at the grocery store. I called AAA thinking I would need a flatbed tow home. When the tow truck driver arrived I filled him in on the fact that I checked the battery voltage and that wasn't the problem. DSC00014.jpgDSC00016.jpg He immediately went to the fuse and relay box in front of the battery and identified relay #78 as a start relay and swapped it with one of the A/C relays. My truck immediately started. I got the truck home okay that evening. The next day I had a similar problem. Swapped out the relay again with another and the truck started. I went to Autozone and although they had relays they weren't the specific kind I needed. My local dealership had two in stock and I took those. Part#19116057 with a "2752" marked on top. I recommend everyone carry a spare relay or two; just in case. I've date marked the new relay I installed and so far I haven't had a problem.
Now the little rodent gremlin that's been leaving tracks on my engine parts is another matter. I set mouse traps on top of the engine last night and one of them was set off but no critter was trapped. I may need a bigger trap if this continues...
 
J

JPaul

Well-Known Member
Messages
2,436
Location
Way up north, UT
My wife's Dodge Charger had this same problem with the starter relay going out. In her situation it was interesting because as far back as maybe a year ago we noticed that it took a few seconds from the time you turned the key to start and the motor actually starting to turn over. It slowly got worse, going from a second or two to probably as much as 5-8 seconds. Finally it just wouldn't start. I think the coil was losing strength slowly and had a hard time closing the contacts. We did the same thing with swapping a relay from her wipers. Irritatingly Autozone has the wrong part # for those relays in their system, it was one of the micro relays and they have a part # for the larger full size relay.
 
S

steelcityk9cop

Probationary Member
Messages
4
When you said it would not start are you talking dead to the world or would it turn over and over and over and just not start? If it's the later and it happens again, let it sit for 10 FULL minutes and see if it starts again without issue. If it does, it's not the relay, it's a bad ignition causing a well known problem woth H3's.

Sent from my SM-N900V using Tapatalk
 
Mr_Rich

Mr_Rich

Well-Known Member
Messages
667
Location
Yucaipa & Santa Maria
steelcityk9cop said:
When you said it would not start are you talking dead to the world or would it turn over and over and over and just not start? If it's the later and it happens again, let it sit for 10 FULL minutes and see if it starts again without issue. If it does, it's not the relay, it's a bad ignition causing a well known problem woth H3's.

Sent from my SM-N900V using Tapatalk
Click to expand...

It's just started this recently. Turn the key to run (this is already assuming the batt is fully charged, etc.) and I get normal dash light indicators. When I turn the key to start all I get is a blink off/ on momentarily of the dash lights and not even a click under the hood. I noticed I got a blinking "open-lock" icon at the bottom of the speedo gauge. I was wondering if it had something to do with the clutch interlock switch since I have a 5M. It did it again last night on a grocery run and it did start after ten minutes and some of my monkeying with the relays.
 
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Vdawg1115

Vdawg1115

Well-Known Member
Messages
368
Location
Oakland, CA
I recently had a starting issue. It is most likely one of 3 relays, for me it was the one on the left and the one next to itIMG_8309.JPG
 
amrg

amrg

Well-Known Member
Messages
2,317
Location
Qatar
1. Remove battery terminals
2. Swap them with anything not OEM
3. If this doesnt solve your problem, oh well you have upgraded your terminals!


I had the same issue. Everything ok, try to start the truck and nothing. If I wait 10 mins and try again, starts right up. Everyone here told me the first thing to do was to replace the terminals. Did that, problem solved.

It even solved the "sometimes my doors lock/unlock and dash dies while cruising" issue!
 
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J

justin94tt

Well-Known Member
Messages
169
Location
Springfield VA
Mr_Rich said:
It's just started this recently. Turn the key to run (this is already assuming the batt is fully charged, etc.) and I get normal dash light indicators. When I turn the key to start all I get is a blink off/ on momentarily of the dash lights and not even a click under the hood. I noticed I got a blinking "open-lock" icon at the bottom of the speedo gauge. I was wondering if it had something to do with the clutch interlock switch since I have a 5M. It did it again last night on a grocery run and it did start after ten minutes and some of my monkeying with the relays.
Click to expand...

This is a common problem with GM vehicles. The passlock system is being activated. I disabled mine completely. If anyone wants to know how let me know. It requires cutting 1 wire under steering column, the security light will stay on afterwards but does not effect starting. Below is the passlock relearn procedure.


10 minute relearn procedure
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON, vehicle will not start.
Observe the SECURITY light. After approximately 10 minutes , the security light will turn OFF. The vehicle is now ready to relearn the Pass lock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. Turn OFF the ignition, and wait 5 seconds. Start the engine, the vehicle has now learned the voltage reading coming back from the ignition switch.
 
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Kyle

Kyle

Well-Known Member
Messages
1,707
Location
Santa Clarita, CA
justin94tt said:
This is a common problem with GM vehicles. The passlock system is being activated. I disabled mine completely. If anyone wants to know how let me know. It requires cutting 1 wire under steering column, the security light will stay on afterwards but does not effect starting. Below is the passlock relearn procedure.


10 minute relearn procedure
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON, vehicle will not start.
Observe the SECURITY light. After approximately 10 minutes , the security light will turn OFF. The vehicle is now ready to relearn the Pass lock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. Turn OFF the ignition, and wait 5 seconds. Start the engine, the vehicle has now learned the voltage reading coming back from the ignition switch.
Click to expand...
Cutting one wire is all thats required? I thought the only way to get rid of passlock was via tune.
 
S

steelcityk9cop

Probationary Member
Messages
4
Had the exact issue you are describing with my 06 H3. Tried almost all the fixes listed above but it always came back. Ended up being a bad ignition switch.

Sent from my SM-N900V using Tapatalk
 
Mr_Rich

Mr_Rich

Well-Known Member
Messages
667
Location
Yucaipa & Santa Maria
justin94tt said:
This is a common problem with GM vehicles. The passlock system is being activated. I disabled mine completely. If anyone wants to know how let me know. It requires cutting 1 wire under steering column, the security light will stay on afterwards but does not effect starting. Below is the passlock relearn procedure.


10 minute relearn procedure
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON, vehicle will not start.
Observe the SECURITY light. After approximately 10 minutes , the security light will turn OFF. The vehicle is now ready to relearn the Pass lock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. Turn OFF the ignition, and wait 5 seconds. Start the engine, the vehicle has now learned the voltage reading coming back from the ignition switch.
Click to expand...

I think this is important since this seems to be an intermittent problem; it happened to me again last night. I waited the required ten minutes and my truck started.

I'm renewing this previous post since it may be helpful to others. Don't chase your tail trying to solve a problem that isn't there when it could be this situation. It's annoying but with all these integrated vehicle computers I'm not ready for a drastic fix.
 
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