No bus, Gauges Work - Competition Diesel.Com

AKDieseL · 02-28-2018, 10:30 PM

I inherited a project, '99 engine swapped into '00 truck, that wouldn't start. I got the truck running, crank sensor unplugged and fuel pump electronics all haywire. Truck runs great, starts fine, etc. However there is one hiccup I can't figure out. After the grid heater cycles check gages lights up, then no bus and check engine. As I said, truck runs great, gauges work fine. I have gone thru all engine bay grounds that I can find. 2 down on fender well below driver side battery, 1 on top radiator support/front quarter panel driver side. Pcm to firewall. 1 from main engine loom that I believe used to be to p/s bolt, I rerouted it to driver fender well. 1 from driver battery negative to frame. Didn't disconnect and inspect gray plug on passenger side fender which I believe is "g115", but I know it's plugged in.

Is there one I'm missing? Should I make separate ground connecting battery, to block, to frame and to cab? Or is this gonna be a '99 vs '00 difference? Friend really wants this cured so he can sell it. Thanks for any help.

AKDieseL · 03-14-2018, 12:07 AM

In case anyone runs into this problem, it turned out to be the pcm. When the engines were swapped, they swapped pcms as well. So guess pcms must stay with the truck, not the engine.

Ackerdiesel · 03-14-2018, 02:52 AM

The 01 cluster requires a signal from the ecm of some sort that it gets VIA the PCM.

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jlbayes · 03-14-2018, 07:29 AM

Quote:

Originally Posted by Ackerdiesel

The 01 cluster requires a signal from the ecm of some sort that it gets VIA the PCM.

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All the 98-02 trucks require that.

Ackerdiesel · 03-14-2018, 09:36 AM

98/some 99 do not. I tested clusters from both in my 12v swap before buying one

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jlbayes · 03-14-2018, 10:48 AM

98 is specific to 98. All 98-02 run off ccd bus. The 98s are pinned differently than the 99+.

Ackerdiesel · 03-14-2018, 10:50 AM

My 01 12v swap has a 98 cluster. No repinning needed. It also ran with a test 99 cluster to kill the no bus message

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jlbayes · 03-15-2018, 07:44 AM

This is why. 1999 was the bastard year apparently.

Ackerdiesel · 03-15-2018, 09:40 AM

That makes sense. I may be wrong on the one cluster being a 99. It may have been a 2000 but either way. I know the earlier clusters didn’t give no bus with the 12v swap truck where the 01 did give No Bus

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02-28-2018, 10:30 PM	#1
AKDieseL Name: AKDieseL Title: Rookie Status: Not Here Join Date: Jan 2018 Location: Talkeetna, Alaska Member`s Gallery Posts: 29	No bus, Gauges Work I inherited a project, '99 engine swapped into '00 truck, that wouldn't start. I got the truck running, crank sensor unplugged and fuel pump electronics all haywire. Truck runs great, starts fine, etc. However there is one hiccup I can't figure out. After the grid heater cycles check gages lights up, then no bus and check engine. As I said, truck runs great, gauges work fine. I have gone thru all engine bay grounds that I can find. 2 down on fender well below driver side battery, 1 on top radiator support/front quarter panel driver side. Pcm to firewall. 1 from main engine loom that I believe used to be to p/s bolt, I rerouted it to driver fender well. 1 from driver battery negative to frame. Didn't disconnect and inspect gray plug on passenger side fender which I believe is "g115", but I know it's plugged in. Is there one I'm missing? Should I make separate ground connecting battery, to block, to frame and to cab? Or is this gonna be a '99 vs '00 difference? Friend really wants this cured so he can sell it. Thanks for any help.

03-14-2018, 02:52 AM	#3
Ackerdiesel Name: Ackerdiesel Title: Too Much Time Status: Not Here Join Date: Nov 2010 Location: Western KY Member`s Gallery Posts: 1,086	The 01 cluster requires a signal from the ecm of some sort that it gets VIA the PCM. Sent from my iPhone using Tapatalk Pro __________________ 04.5 2500 CR Built by Cruel Intentions Diesel with the help of: D&J Precision Machine S&S Diesel Motorsports BD Diesel Performance Diesel Performance Converters Pro Street Diesel Drivelines Plus Done Right Diesel Performance Firepunk

03-14-2018, 09:36 AM	#5
Ackerdiesel Name: Ackerdiesel Title: Too Much Time Status: Not Here Join Date: Nov 2010 Location: Western KY Member`s Gallery Posts: 1,086	98/some 99 do not. I tested clusters from both in my 12v swap before buying one Sent from my iPhone using Tapatalk Pro __________________ 04.5 2500 CR Built by Cruel Intentions Diesel with the help of: D&J Precision Machine S&S Diesel Motorsports BD Diesel Performance Diesel Performance Converters Pro Street Diesel Drivelines Plus Done Right Diesel Performance Firepunk

03-14-2018, 10:48 AM	#6
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	98 is specific to 98. All 98-02 run off ccd bus. The 98s are pinned differently than the 99+. __________________ Jacob, 97 rclb

03-14-2018, 10:50 AM	#7
Ackerdiesel Name: Ackerdiesel Title: Too Much Time Status: Not Here Join Date: Nov 2010 Location: Western KY Member`s Gallery Posts: 1,086	My 01 12v swap has a 98 cluster. No repinning needed. It also ran with a test 99 cluster to kill the no bus message Sent from my iPhone using Tapatalk Pro __________________ 04.5 2500 CR Built by Cruel Intentions Diesel with the help of: D&J Precision Machine S&S Diesel Motorsports BD Diesel Performance Diesel Performance Converters Pro Street Diesel Drivelines Plus Done Right Diesel Performance Firepunk

03-14-2018, 12:07 AM	#2
AKDieseL Name: AKDieseL Title: Rookie Status: Not Here Join Date: Jan 2018 Location: Talkeetna, Alaska Member`s Gallery Posts: 29	In case anyone runs into this problem, it turned out to be the pcm. When the engines were swapped, they swapped pcms as well. So guess pcms must stay with the truck, not the engine.

03-15-2018, 09:40 AM	#9
Ackerdiesel Name: Ackerdiesel Title: Too Much Time Status: Not Here Join Date: Nov 2010 Location: Western KY Member`s Gallery Posts: 1,086	That makes sense. I may be wrong on the one cluster being a 99. It may have been a 2000 but either way. I know the earlier clusters didn’t give no bus with the 12v swap truck where the 01 did give No Bus Sent from my iPhone using Tapatalk Pro __________________ 04.5 2500 CR Built by Cruel Intentions Diesel with the help of: D&J Precision Machine S&S Diesel Motorsports BD Diesel Performance Diesel Performance Converters Pro Street Diesel Drivelines Plus Done Right Diesel Performance Firepunk