Discussion:
Error 21 Wiring Diagram (Damaged Loom)

Hello,

I've a 2004 GP25N displaying error E-21, I've found out that the error is for the air flow meter signal, after further investiagtion I've found that the wiring too the sensor has been damaged (eatten by a rat) I've placed an order for a new Air Flow Meter but unfortantly due to the damage there is no plug on the loom and I need to make a new loom too plug in but im unclear as too which cable is plugged into which pin on sensor.

If somebody is able too send the diagram over I will be massively greatful

Truck Details
GP25N
ET17DL-0650155
2004 YOM
  • Posted 14 Jul 2020 01:31
  • By Lordmoss13
  • joined 3 Jul'20 - 15 messages
  • Wales, United Kingdom
Showing items 1 - 1 of 1 results.
figured it out yet?
i found some info on this that might help
1- looking at the plug it is a flat 5 terminal plug with a locking tab on one side, if you lay the plug down flat on a table with locking tab on top the terminal layout goes from left to right 1-2-3-4-5.
terminal 5 wire connects to terminal 119 of ecm or bridged in harness wire that connects to 119.
terminal 4 wire connects/bridges to terminal 1 at connector (terminal 1 connects to ecm terminal 67.
terminal 3 wire connects to ecm terminal 51
terminal 2 wire connects to ecm terminal 34
terminal 1 wire connects to ecm terminal 67 (bridges to terminal 4 on plug)
The diagram i'm looking at does not show any wire colors unfortunatly.
  • Posted 16 Aug 2020 04:13
  • By swoop223
  • joined 23 Mar'12 - 3,691 messages
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Global Industry News
edition #1248 - 18 September 2025
In this week’s Forkliftaction News we report on the recent IMHX event in Birmingham with coverage of new product launches, key themes and observations from those attending. We also name the winners of the 2025 Archies Awards, held in conjunction with IMHX... Continue reading
Fact of the week
In May 2023, a Belgian Malinois named Wilson played a key role in the rescue of four children lost in the Amazon jungle. The young children were missing for 40 days after a plane crash that killed their mother and other adults. Wilson tracked the children's footprints, leading the military to their location.
Global Industry News
edition #1248 - 18 September 2025
In this week’s Forkliftaction News we report on the recent IMHX event in Birmingham with coverage of new product launches, key themes and observations from those attending. We also name the winners of the 2025 Archies Awards, held in conjunction with IMHX... Continue reading
Fact of the week
In May 2023, a Belgian Malinois named Wilson played a key role in the rescue of four children lost in the Amazon jungle. The young children were missing for 40 days after a plane crash that killed their mother and other adults. Wilson tracked the children's footprints, leading the military to their location.
Taylor T520M
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
Hangcha CPYD25XH21F-JC
Flesherton, Ontario, Canada
New - Sale
Upcoming industry events …
October 15-16, 2025 - Amsterdam, United States
October 15-16, 2025 - Las Vegas, United States
June 30 - Jully 2, 2026 - Birmingham, United Kingdom
Latest job alerts …
Clinton, IA, United States
Fact of the week
In May 2023, a Belgian Malinois named Wilson played a key role in the rescue of four children lost in the Amazon jungle. The young children were missing for 40 days after a plane crash that killed their mother and other adults. Wilson tracked the children's footprints, leading the military to their location.