Fuse Block Left Side Of Dash

cjobrien1972 · January 22, 2011

I have a 2004 Silverado LLY. The fuse block on the driver side under the plastic panel is the area I need help in.

On the fuse block in the lower left corner there are 5 pins not in use from the factory. Two are in one column, then beside them are 3 in another column.

I used the two bottom pins in the row of three to supply power to some accessories. The bottom two are switched with the ignition and the top one is constant. It has been wired like this for years.

Recently I had the power stop working on the middle pin. I assume there is a fuse somewhere that supplies power to this pin. I can not find it?

Can anyone help me find where the power comes from and the fuse that supports it. I assume it ties into the panel near the drivers foot, but I still can't find the fuse link.

And yes, if I move me connection to the constant power, my accessory turns on. Basically the middle pin is dead for some reason?

8.1HD/ALLISON · January 22, 2011

Not sure what the pins are, but have you checked the fuses under the hood? There has to be a fuse somewhere for that circuit.

cjobrien1972 · January 23, 2011

Not sure what the pins are, but have you checked the fuses under the hood? There has to be a fuse somewhere for that circuit.

Yea, I checked the one under the hood too and could not locate a bad fuse. If you pop that plastic panel off on the driver side and look down toward the bottom of the fuse block, you will see an open area with 5 total male pins for a female plug sticking out. (2 go together, then beside it are a cloum of 3).

Based on the pic of your maroon truck its the same design as mine. If you open that panel you will see. I have a picture, but I can't get it to post. Do I need to put the pic on the web? Can I send it to you in e-mail format?

8.1HD/ALLISON · January 23, 2011

Connector Part Information

• 15401495

• 48-Way M Metri-Pack 280 Series (BLK)

Pin Wire Color Circuit No. Function

2A DK GRN 117 Right Front Speaker Output (-) (UQ3/UQ5)

DK GRN

117

Right Front Speaker Output (-) (UQ7/Y91)

2B

LT GRN

200

Right Front Speaker Output (+) (UQ3/UQ5)

LT GRN

200

Right Front Speaker Output (+) (UQ7/Y91)

2C

BLK

1851

Ground (AU3 w/o YE9)

2D

BRN/WHT

230

Instrument Panel Lamps Dimming Control (AU3 w/o YE9/Y91)

2E

TAN/WHT

746

Right Front Door Ajar Switch Signal (w/o YE9)

2F

BLK

1050

Ground

3A- 3F

--

Not Used

4A

BLK

1050

Ground

4B

ORN

52

Blower Motor High Control (C42 and CJ3)

GRY/BLK

2337

Lower Right Air Temperature Sensor Signal (CJ2)

4C

PPL

73

Medium 3 Blower Motor Control (C42 and CJ3)

BRN

718

Low Reference (CJ2)

4D

RED

542

Battery Positive Voltage

4E

TAN

63

Blower Motor Medium 1 Control (C42 and CJ3)

PPL

1838

Recirculation Door Position Signal (CJ2)

4F

PPL/WHT

760

Blower Motor Speed Control (CJ2)

4G

YEL

60

Blower Motor Low Control (C42/CJ3)

4H

--

Not Used

4J

LT BLU/BLK

1688

5-Volt Reference (CJ3/CJ2)

4K

LT BLU

72

Medium 2 Blower Motor Control (CJ3/C42)

4L

--

Not Used

4M

YEL

1791

Low Reference (CJ2/CJ3)

5A

--

Not Used

5B

LT GRN

2275

Mode Door Position Signal (CJ2/CJ3)

5C

TAN

2273

Mode Door Control (CJ2/CJ3)

5D

DK BLU

1199

Left Air Temperature Door Control (CJ2/CJ3)

5E

LT BLU

733

Left Air Temperature Door Position Signal (CJ2/CJ3)

5F

--

Not Used

6A

ORN

3840

Battery Positive Voltage (CF5)

6B

BRN

2409

Interior Park Lamps Supply Voltage

6C

BLK

1050

Ground

6D

DK BLU

1353

RAP Supply Voltage (CF5)

6E-6F

--

Not Used

7A

GRY

295

Door Lock Actuator Lock Control (AU3 w/o YE9)

7B

TAN

1047

PDM Class 2 Serial Data

7C

ORN

4240

Battery Positive Voltage (YE9)

7D

TAN

294

Door Lock Actuator Unlock Control (AU3 w/o YE9)

7E

WHT

194

Door Unlock Control (AU3 w/o YE9)

ORN

1340

Battery Positive Voltage (YE9)

7F

LT BLU

195

Door Lock Control (AU3 w/o YE9)

DK BLU

2115

Right Turn Signal Lamps Supply Voltage (Except Base)

8A

WHT/BLK

2339

Lower Left Air Temperature Sensor Signal (CJ2)

8B

--

Not Used

8C

BRN

341

Ignition 3 Voltage (CJ2/CJ3)

8D

DK BLU

1646

Right Air Temperature Door Position Signal (CJ2/CJ3)

8E

WHT/BLK

1236

Right Air Temperature Door Control (CJ2/CJ3)

8F

DK GRN

1614

Recirculation Door Control (CJ2/CJ3)

I believe you are talking about pins 3a-3f. I have searched functions for these pins and all I can find is " not used." It is possible the connection was lost inside the junction block. Best thing I can say at this point is to find another wire to use.