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Help!! Truck won’t start

dctackett10
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dctackett10 Enthusiast

dctackett10

Posted
Posted

Ok..  so I was uninstalling my rollbar on my 2019 custom trailboss because I had plan on trading it in this weekend to a LT trailboss. Got to the wire harness part and could not get the wire out from underneath the fuse box under the hood. So I ended up just cutting that wire. (It was the correct wire, wire for the roll bar harness).  Went to start my truck and now it won’t start, won’t even crank. Music, lights and everything comes on but it will not crank. 
 

it says to service battery charging system, service esc, service 4 wheel drive, traction control off. 
hooked my scan reader up to it and it’s showing 8 codes.


P062B. P0690. P16B3. P16BF. P062B pd. P0690 pd. P16B3 pd. P16BF pd.

 

I got a appointment Wednesday to get it towed and looked at by the dealer but does anybody know what the problem is?  I checked fuses and relays and none seem to be blown, unhooked the battery for about 20 mins and nothing, any ideas?? 

Transient Senior Enthusiast

Transient

Posted
Posted

Did you check to make sure the negative cable for the starter was still connected to the negative terminal of the battery? It may have dropper under or next to the battery between the battery and firewall under the windshield if you messed with that terminal. It happened to me once, and I didn't realize it. Check to make sure it's still connected.

Sent from my SM-N960U using Tapatalk

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
1 hour ago, dctackett10 said:

5.3 

 

I'm somewhat concerned here.  I think whoever installed the sport bar originally tied the bar into the wrong circuit and now you cutting the wire has interrupted the Powertrain Main Relay #1 power supply hence your no start.

 

You are gonna have to pull the UEC off and get down to the connectors.  The connector they should have tied into is X2 (top right) but it sounds like they tied into X3 (bottom left).

 

    

X50A Fuse Block - Underhood X3 (L82)
 
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 33384584
  • Service Connector: 19371176
  • Description: 44-Way F 1.5, 2.8, 6.3 CTS, 9.5 MCON-LL Series (GY)


Terminal Part Information

Terminal Type ID

Terminated Lead

Diagnostic Test Probe

Terminal Removal Tool

Service Terminal

Tray Name

Core Crimp

Insulation Crimp

I

13582286

J-35616-35 (VT)

J-38125-557

1241390-1

Lear 17

F

D

II

19332365

J-35616-14 (GN)

J-38125-560A

Not Available

Not Available

Not Available

Not Available

III

19332366

J-35616-35 (VT)

J-38125-212

Not Available

Not Available

Not Available

Not Available

IV

Not Required

J-35616-22 (RD)

No Tool Required

Not Available

Not Available

Not Available

Not Available


X50A Fuse Block - Underhood X3 (L82)

Pin

Size

Color

Circuit

Function

Terminal Type ID

Option

A1

0.5

VT/GN

439

Run/Crank Ignition 1 Voltage 4

III

—

A2

0.5

0.5

WH/GY

VT/BK

2139

2139

Run/Crank Ignition 1 Voltage 21

Run/Crank Ignition 1 Voltage 21

III

—

—

A3

—

—

—

Not Occupied

—

—

A4

0.5

BN/GN

59

A/C Compressor Clutch Control

III

—

A5 - A6

—

—

—

Not Occupied

—

—

B1

2.5

YE

6

Starter Solenoid Actuator Crank Ignition Voltage

I

—

B2

0.5

YE/BK

625

Starter Enable Relay Control

III

—

B3 - B5

—

—

—

Not Occupied

—

—

B6

2.5

RD/GY

1342

Primary Fused Battery Positive Voltage 13

I

—

C1 - C2

—

—

—

Not Occupied

—

—

C3

1

BK

4450

Ground 44

II

—

C4

0.5

WH/GY

459

A/C Compressor Clutch Relay Control

II

—

C5

0.5

VT/YE

3854

Cabin Heater Coolant Pump Motor Control

II

—

C6

0.5

VT/BU

5290

Powertrain Main Relay Fused Supply 1

II

—

C7

0.5

VT/BU

5290

Powertrain Main Relay Fused Supply 1

II

—

C8 - D1

—

—

—

Not Occupied

—

—

D2

10

RD/WH

342

Primary Fused Battery Positive Voltage 3

IV

—

E1

—

—

—

Not Occupied

—

—

E2

10

RD/GY

642

Primary Fused Battery Positive Voltage 6

IV

—

F1

—

—

—

Not Occupied

—

—

F2

0.5

YE/VT

4325

Starter Pinion Solenoid Actuator Relay Control

II

—

F3

0.5

RD/BN

440

Secondary Fused Battery Positive Voltage 4

II

—

F4

0.5

YE

5991

Powertrain Relay Coil Control

II

—

F5 - F6

—

—

—

Not Occupied

—

—

F7

0.5

VT/BU

5705

Powertrain Main Relay Fused Supply 6

II

—

F8 - G1

—

—

—

Not Occupied

—

—

G2

0.75

VT/BU

5292

Powertrain Main Relay Fused Supply 3

III

—

G3

—

—

—

Not Occupied

—

—

G4

0.5

VT/BU

5293

Powertrain Main Relay Fused Supply 4

III

—

G5

1

VT/BU

5291

Powertrain Main Relay Fused Supply 2

III

—

G6

0.75

VT/BU

5291

Powertrain Main Relay Fused Supply 2

III

—

H1

2

VT/BU

5290

Powertrain Main Relay Fused Supply 1

I

—

H2

1

VT/BU

5292

Powertrain Main Relay Fused Supply 3

III

—

H3

0.5

VT/BU

5294

Powertrain Main Relay Fused Supply 5

III

—

H4 - H5

—

—

—

Not Occupied

—

—

H6

0.5

VT/BU

5290

Powertrain Main Relay Fused Supply 1

III

—

Edited by newdude
  • Like 1
newdude Senior Enthusiast

newdude

Posted
Posted

 

Quote

 

UEC (Underhood Electrical Center)

  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Vehicle Service Manual.
  2. Disengage the retaining tabs and remove the UEC cover (1) from the top of the UEC.
  3. Remove the nut (3) and terminal ring (4) from the UEC terminal post (1).
  4. Loosen the four bolts (2) on the top of UEC.
  5. Disengage the retaining tabs (1), pull up and remove the UEC (2) from its base.
  6. Remove the fasteners (4) from the UEC base (5).
  7. Disengage retaining tab (3) from side bracket (2).
  8. Lift up and remove UEC base from brackets (1), (2).
  9. Locate body 2 connector (2) in the UEC and remove body 2 connector (2) from clip to access the wire side of connector. Refer to Delphi Connectors in Vehicle Service Manual.

    Note: If terminal is not present in cavity H1, insert the CHMSL wire terminal on the sport bar harness into cavity H1 and proceed to step 13.

  10. Locate Cavity H1 (1) on the Body 2 connector (2) in the UEC and remove the terminal from Cavity H1, if present, DO NOT CUT OFF terminal. Remove Terminal per service guidelines. Refer to Delphi Connectors in Vehicle Service Manual.
  11. Use slit in convolute to insert terminated CHMSL wire from underbody harness into Cavity H1 in place of the removed circuit.
  12. Cover the terminal that was removed and the un-needed terminal from the accessory harness with vinyl tape and store them out of the way. Proceed to step 14

    Note: Do not cut off the terminal that was removed, the vehicle owner may want to return to the original CHMSL.


 

  1.  

    sdgsdg.thumb.png.1bf987dde0952cd1b07aca33163e7063.png

  • Like 1
newdude Senior Enthusiast

newdude

Posted
Posted (edited)
1 hour ago, dctackett10 said:

 

 

 

So after you've digested the info above...

 

HOPEFULLY who ever installed it left the terminal for that in there taped up on the end of a piece of wire.  

 

If not, you will have to splice the end of the sport bar wire with the terminal that you left in there into the wire that should be taped up near by.  It sounds like it was tied into slot H1 on X3 so in the picture of the electrical main connectors, the bottom left.  It SHOULD have been put into H1 in the top right plug which is X2 connector.  

 

The slot H1 ignition relay supply #1 power wire per the connector chart above is a VIOLET WIRE with a BLUE STRIPE.  

Edited by newdude
  • Like 1
newdude Senior Enthusiast

newdude

Posted
Posted

DTC P0690

Engine Controls Ignition Relay Feedback Circuit High Voltage

 

DTC P1682

Ignition 1 Switch Circuit 2

 

DTC P16A7

Engine Controls Ignition Relay Feedback Circuit 2

 

DTC P16AF

Engine Controls Ignition Relay Feedback Circuit 2 Low Voltage

 

DTC P16B3

Engine Controls Ignition Relay Feedback Circuit 2 High Voltage

 

DTC P16BC

Engine Controls Ignition Relay Feedback Circuit 3

 

DTC P16BD

Engine Controls Ignition Relay Feedback Circuit 3 Low Voltage

 

DTC P16BF

Engine Controls Ignition Relay Feedback Circuit 3 High Voltage

  • Like 1
  • 3 years later...
jernizzle New Member

jernizzle

Posted
Posted (edited)

I know it's a long shot but did you ever figure out the issue from 3 years ago? I have the same thing going on. 

Edited by jernizzle
  • 2 months later...
tcafranz Enthusiast

tcafranz

Posted
Posted
On 12/30/2024 at 9:35 AM, jernizzle said:

I know it's a long shot but did you ever figure out the issue from 3 years ago? I have the same thing going on. 

How about you? I have the same issue. 

tcafranz Enthusiast

tcafranz

Posted
Posted
On 4/16/2021 at 2:15 PM, newdude said:

 

I'm somewhat concerned here.  I think whoever installed the sport bar originally tied the bar into the wrong circuit and now you cutting the wire has interrupted the Powertrain Main Relay #1 power supply hence your no start.

 

You are gonna have to pull the UEC off and get down to the connectors.  The connector they should have tied into is X2 (top right) but it sounds like they tied into X3 (bottom left).

 

    

X50A Fuse Block - Underhood X3 (L82)
 
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 33384584
  • Service Connector: 19371176
  • Description: 44-Way F 1.5, 2.8, 6.3 CTS, 9.5 MCON-LL Series (GY)

 

Terminal Part Information

Terminal Type ID

Terminated Lead

Diagnostic Test Probe

Terminal Removal Tool

Service Terminal

Tray Name

Core Crimp

Insulation Crimp

I

13582286

J-35616-35 (VT)

J-38125-557

1241390-1

Lear 17

F

D

II

19332365

J-35616-14 (GN)

J-38125-560A

Not Available

Not Available

Not Available

Not Available

III

19332366

J-35616-35 (VT)

J-38125-212

Not Available

Not Available

Not Available

Not Available

IV

Not Required

J-35616-22 (RD)

No Tool Required

Not Available

Not Available

Not Available

Not Available

 

X50A Fuse Block - Underhood X3 (L82)

Pin

Size

Color

Circuit

Function

Terminal Type ID

Option

A1

0.5

VT/GN

439

Run/Crank Ignition 1 Voltage 4

III

—

A2

0.5

0.5

WH/GY

VT/BK

2139

2139

Run/Crank Ignition 1 Voltage 21

Run/Crank Ignition 1 Voltage 21

III

—

—

A3

—

—

—

Not Occupied

—

—

A4

0.5

BN/GN

59

A/C Compressor Clutch Control

III

—

A5 - A6

—

—

—

Not Occupied

—

—

B1

2.5

YE

6

Starter Solenoid Actuator Crank Ignition Voltage

I

—

B2

0.5

YE/BK

625

Starter Enable Relay Control

III

—

B3 - B5

—

—

—

Not Occupied

—

—

B6

2.5

RD/GY

1342

Primary Fused Battery Positive Voltage 13

I

—

C1 - C2

—

—

—

Not Occupied

—

—

C3

1

BK

4450

Ground 44

II

—

C4

0.5

WH/GY

459

A/C Compressor Clutch Relay Control

II

—

C5

0.5

VT/YE

3854

Cabin Heater Coolant Pump Motor Control

II

—

C6

0.5

VT/BU

5290

Powertrain Main Relay Fused Supply 1

II

—

C7

0.5

VT/BU

5290

Powertrain Main Relay Fused Supply 1

II

—

C8 - D1

—

—

—

Not Occupied

—

—

D2

10

RD/WH

342

Primary Fused Battery Positive Voltage 3

IV

—

E1

—

—

—

Not Occupied

—

—

E2

10

RD/GY

642

Primary Fused Battery Positive Voltage 6

IV

—

F1

—

—

—

Not Occupied

—

—

F2

0.5

YE/VT

4325

Starter Pinion Solenoid Actuator Relay Control

II

—

F3

0.5

RD/BN

440

Secondary Fused Battery Positive Voltage 4

II

—

F4

0.5

YE

5991

Powertrain Relay Coil Control

II

—

F5 - F6

—

—

—

Not Occupied

—

—

F7

0.5

VT/BU

5705

Powertrain Main Relay Fused Supply 6

II

—

F8 - G1

—

—

—

Not Occupied

—

—

G2

0.75

VT/BU

5292

Powertrain Main Relay Fused Supply 3

III

—

G3

—

—

—

Not Occupied

—

—

G4

0.5

VT/BU

5293

Powertrain Main Relay Fused Supply 4

III

—

G5

1

VT/BU

5291

Powertrain Main Relay Fused Supply 2

III

—

G6

0.75

VT/BU

5291

Powertrain Main Relay Fused Supply 2

III

—

H1

2

VT/BU

5290

Powertrain Main Relay Fused Supply 1

I

—

H2

1

VT/BU

5292

Powertrain Main Relay Fused Supply 3

III

—

H3

0.5

VT/BU

5294

Powertrain Main Relay Fused Supply 5

III

—

H4 - H5

—

—

—

Not Occupied

—

—

H6

0.5

VT/BU

5290

Powertrain Main Relay Fused Supply 1

III

—

That link takes me to a GM site asking for a login

GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted
1 hour ago, tcafranz said:

That link takes me to a GM site asking for a login

We are here to learn more about your concerns and act as an extra layer of assistance. So that we can help, please send an email to [email protected] with "GM Trucks Forum" in the subject line. We look forward to your message. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.

newdude Senior Enthusiast

newdude

Posted
Posted
16 hours ago, tcafranz said:

That link takes me to a GM site asking for a login

 

 

Don't click it.  That's why the chart is posted.  

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