Cluster Plug Pinout Diagrams - 1986 Pin #6 mapping?

[blindbug]

I found the below pin-out diagrams for the cluster plug on my 1986 Non-Gauge C10. When I look at the utilized pins on my plug, however, I see that there is (1) additional pin that is utilized on my plug that is not mapped in this diagram.

For me, I have a Pin #6 in my plug, but in the diagram I don't see #6 as being utilized in 1986.

Does anyone have any idea what pin #6 is mapped to? Does anyone know if the attached diagram is accurate for 1986 non-gauge (idiot light) cluster implementations?

Thanks in advance.

[Goats86]

That could be pin 8, 11, 2, or 17 depending on the orientation of the plug. What color is the wire?

[blindbug]

Originally Posted by Goats86

That could be pin 8, 11, 2, or 17 depending on the orientation of the plug. What color is the wire?

Yeah, sorry. Disregard the test probe. I was just using it to keep my sausage fingers out of the picture. The probe is touching pin 2 in that picture.

[Goats86]

check out this diagram

[blindbug]

Originally Posted by Goats86

check out this diagram

Is there any more to that one? Looks promising but doesn’t say what the pins function(s) are. Also that diagram doesn’t have pin 16, which I think is seat belt warning. I do have a wire running to my belts, so it might just be that 16 isn’t common for all the years.

[ray_mcavoy]

Pin #6 on the non-gauge (warning light) cluster is a key switched power feed to one side of the "battery / GEN" light. Should be a brown wire identified by circuit #50 on the factory diagrams and lead back to the "Heater / AC" fuse.

The other side of the "battery / GEN" light is connected to pin #7. It also uses a brown wire but this one is identified as circuit #25 and connects to the alternator.

[blindbug]

Originally Posted by ray_mcavoy

Pin #6 on the non-gauge (warning light) cluster is a key switched power feed to one side of the "battery / GEN" light. Should be a brown wire identified by circuit #50 on the factory diagrams and lead back to the "Heater / AC" fuse.

The other side of the "battery / GEN" light is connected to pin #7. It also uses a brown wire but this one is identified as circuit #25 and connects to the alternator.

Excellent, thank you!

To make a long story short, I am trying to wire up a Dakota Digital Gauge Cluster and am trying to find out where to wire up a couple of things.

Fuel Send - Pin 18
Fuel Negative - I don't know? Run a new wire?
Tach Input - New wire to TACH side of HEI distributor
12 volt Accessory Switched - Pin 6
12 volt constant - Pin 5
Ground - Pin 9
High Beam Indicator - Pin 1
Parking break Indictor - Pin 8
Left Turn Indicator - Pin 10
Right Turn Indicator - Pin 11

Would anyone care to validate the pins above?

I wonder if I can use the dimmer on the stock headlights switch to dim the VHX gauges?

[ray_mcavoy]

Originally Posted by blindbug

To make a long story short, I am trying to wire up a Dakota Digital Gauge Cluster and am trying to find out where to wire up a couple of things.

Fuel Send - Pin 18 Yes
Fuel Negative - I don't know? Run a new wire? Double check with the Dakota Digital instructions, but I believe this is a ground reference for the fuel sending unit and could be connected to pin 9. Or run a new wire all the way to the sending unit body to reduce any potential issues (rust, loose connections, etc.) that could occur using the stock ground path.
Tach Input - New wire to TACH side of HEI distributor Yes, this will require a new wire run to the TACH connector on the HEI
12 volt Accessory Switched - Pin 6 Yes, this pin will work for switched power. You could also use pin 5 ... it's switched on/off via the ignition too.
12 volt constant - Pin 5 No, pin 5 is switched and not constant. The factory cluster plug doesn't have any constant power wire so you'll have to run a new wire to the fuse box.
Ground - Pin 9 Yes
High Beam Indicator - Pin 1 Yes
Parking break Indictor - Pin 8 Yes, the switch on the parking brake (and the switch on the combination/proportioning valve) ground this wire to activate the brake warning light. So as long as the Dakota Digital system is configured to activate the light when this wire is grounded, it should work.
Left Turn Indicator - Pin 10 Yes
Right Turn Indicator - Pin 11 Yes

Would anyone care to validate the pins above?

See my comments in blue.

Originally Posted by blindbug

I wonder if I can use the dimmer on the stock headlights switch to dim the VHX gauges?

The control in the stock headlight switch is simply a rheostat (variable resistor) that reduces the voltage to the backlighting bulbs in the stock cluster. If the Dakota Digital cluster has an input that accepts a variable voltage to control the backlighting intensity then it will probably work.