Unhooking TBI Engine Wiring Harness

[davbell22602]

Ok. Whats the trick to unhook the tbi engine wiring harness from the firewall on 88 C1500? I see nothing but bunch of clips and child proof stuff so it wont get unplugged.

 

[RetroC10Sport]

Can you get some pics Dave? I'm not familiar with the GMT-400...I just did one for Hotrod on a SB and it was a 1/4 bolt at the C-100 and a rubber boot leading to the ECM.

 

[davbell22602]

Can you get some pics Dave? I'm not familiar with the GMT-400...I just did one for Hotrod on a SB and it was a 1/4 bolt at the C-100 and a rubber boot leading to the ECM.

Yea, I can get a pic but it will be tomorrow though. Its the black box thingy thats over by the master cylinder on drivers side under the TBI box.

 

[Swims350]

huh? there's a tbi box? and black box by the MC, that's the RWAL box, that thing comes out easy.

 

[davbell22602]

huh? there's a tbi box? and black box by the MC, that's the RWAL box, that thing comes out easy.

Is just held in by 2 little screws or does it unplug?

 

[HotRodPC]

huh? there's a tbi box? and black box by the MC, that's the RWAL box, that thing comes out easy.

I'm sure he reffering to the backside of the fuse block where the 2 or 3 wiring harnesses connect. I'd said its bolts or screws too, but I am uncertain what GMT 400 did differant. I can't imagine much.

I am a bit concerned about the child proof stuff Dave refers too though. Maybe he shouldn't be working on it and why they put that stuff in place.

Just pissin in your post toasties Dave. J/K, Chill out. I already see the veins in your forehead bulging out of your head.

 

[davbell22602]

I'm sure he reffering to the backside of the fuse block where the 2 or 3 wiring harnesses connect. I'd said its bolts or screws too, but I am uncertain what GMT 400 did differant. I can't imagine much.

I am a bit concerned about the child proof stuff Dave refers too though. Maybe he shouldn't be working on it and why they put that stuff in place.

Just pissin in your post toasties Dave. J/K, Chill out. I already see the veins in your forehead bulging out of your head.

HA,HA,HA, funny. I'm not laughing. I'm not laughing yet. I'm still not laughing yet.

 

[oneluckypops]

C100 is the connector your talking about. There is a T20 or T25 bolt that goes thru the center of the connector. BTW you have to have a Torx scredriver to unbolt it, the torx sockets will NOT incert deepenough in the connector.

Oh yea the Black box is most likely the Cruise control module that mounts to the firewall.

 

[davbell22602]

Ok, It looks like this. But this is pic of it on my 90 C2500.

You must be registered for see images attach

 

[Swims350]

that box on the side of the master cylinder and prop valve is the RWAL box I removed mine, it just slips out, you unclip the plug and remove them then the box slides off it's bracket, kinda tough to do so, my bracket rusted and was holding on tight. I had to beat on the box to get it off.

Those plugins unhook like the engine sensors do, lift the tab and pull them off.

 

[davbell22602]

that box on the side of the master cylinder and prop valve is the RWAL box I removed mine, it just slips out, you unclip the plug and remove them then the box slides off it's bracket, kinda tough to do so, my bracket rusted and was holding on tight. I had to beat on the box to get it off.

Those plugins unhook like the engine sensors do, lift the tab and pull them off.

Ok, Just found out theres 1/4 screw in the middle that has to be removed first.

 

[Swims350]

maybe for the tbi harness but not that RWAL box.

 

[davbell22602]

I'm just trying to pull the engine harness so I can pull the engine out.