Help with malfunctioning cluster.

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Jgonick

Full Access Member
Joined
Jan 12, 2017
Posts
313
Reaction score
410
Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
I haven’t done much with LEDs myself. I do know they can be tricky with turn signals especially. LEDs are diodes which means electricity can only flow one way. Side marker turn signals actually flow both directions depending if headlights are on or not.

Also LED turn signals also can require a special flasher. (Which you knew) They don’t pull enough amps to heat the original flasher to make it work.

Maybe someone who knows more will jump in.
 
Last edited:

Dano500

Full Access Member
Joined
Jul 4, 2023
Posts
292
Reaction score
450
Location
Houston, TX
First Name
Dan
Truck Year
1984
Truck Model
K20
Engine Size
5.7
I’m going to replace the signal switch right now. IDK what else to do & now I have no turn signal lights at all. Both outside and the little indicators inside.

Does anyone know what the purple and yellow wires plug into? Found it loose coming from steering column.
 

Attachments

  • A3C829E2-472E-4473-97D1-356526CED2D3.jpeg
    A3C829E2-472E-4473-97D1-356526CED2D3.jpeg
    86.5 KB · Views: 36

Jgonick

Full Access Member
Joined
Jan 12, 2017
Posts
313
Reaction score
410
Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
Purple & Yellow — maybe Transmission neutral starter & backup lamp switch. — or if manual then clutch start interlock.
 
Last edited:

Dano500

Full Access Member
Joined
Jul 4, 2023
Posts
292
Reaction score
450
Location
Houston, TX
First Name
Dan
Truck Year
1984
Truck Model
K20
Engine Size
5.7
Purple & Yellow — maybe Transmission neutral starter & backup lamp switch. — or if manual then clutch start interlock.
It’s not long enough to go where neutral safety switch is, but there is already a plug there. Not long enough to get to fuse box. Now that I dropped that column to do turn signal switch, I still don’t see an empty spot to plug it.

Oh, and the signal switch didn’t work. Is it possible to ruin one of these led flasher relays? I ask because with new one plugged in, now I get zero lighting with turn signals. I put the old relay back in and it went back to the lighting up, but no blinking.
 

Jgonick

Full Access Member
Joined
Jan 12, 2017
Posts
313
Reaction score
410
Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
What do the turn signals do with
1. Headlights off?
2. Headlights on?
3. Do the hazards work?
 

Dano500

Full Access Member
Joined
Jul 4, 2023
Posts
292
Reaction score
450
Location
Houston, TX
First Name
Dan
Truck Year
1984
Truck Model
K20
Engine Size
5.7
@Jgonick so, with lights off solid on and same with lights on.

Hazards don’t work with electronic flasher in there, but this is the one I am wondering if it got damaged. Im going to buy another one in the morning and check again.
 

Jgonick

Full Access Member
Joined
Jan 12, 2017
Posts
313
Reaction score
410
Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
Decent video explaining electronic flasher when switching to LED turn signals- (even though it’s a jeep). He explains possible polarity issue etc.. the same model flasher can also be used in c10s
Electronic Flasher video
 
Last edited:

Jgonick

Full Access Member
Joined
Jan 12, 2017
Posts
313
Reaction score
410
Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
I'll also mention the side marker lamps and why LEDs are sometimes a problem. The current goes both directions depending on whether the headlights are on or not. Hopefully someone who has changed theirs out to LEDs can explain how they did it.
 

Attachments

  • 1_alternating_marker.jpg
    1_alternating_marker.jpg
    19.3 KB · Views: 40
  • 2_alternating_marker.jpg
    2_alternating_marker.jpg
    18.9 KB · Views: 31
  • 3_alternating_marker.jpg
    3_alternating_marker.jpg
    18.3 KB · Views: 36
Last edited:

Dano500

Full Access Member
Joined
Jul 4, 2023
Posts
292
Reaction score
450
Location
Houston, TX
First Name
Dan
Truck Year
1984
Truck Model
K20
Engine Size
5.7
@Jgonick, maybe the new flashers I bought were wrong polarity. Idk. I’m ordering the ones in the video, since they come with the piece to reverse polarity.

Quick question? Are these wires the ones to radio?
 

Attachments

  • 8F6C5B14-5B56-4997-BC51-AAA4A704490F.jpeg
    8F6C5B14-5B56-4997-BC51-AAA4A704490F.jpeg
    117.1 KB · Views: 31

Jgonick

Full Access Member
Joined
Jan 12, 2017
Posts
313
Reaction score
410
Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
Quick question? Are these wires the ones to radio?
Probably- That would be my guess.

blk- gound
yel- power
gry- headlight dimmer (for back lighting)
 

Attachments

  • radio.jpg
    radio.jpg
    92.1 KB · Views: 42
Last edited:

Dano500

Full Access Member
Joined
Jul 4, 2023
Posts
292
Reaction score
450
Location
Houston, TX
First Name
Dan
Truck Year
1984
Truck Model
K20
Engine Size
5.7
Flasher problem solved, but of course another gremlin comes out.

1. Hazards on- drive front doesn’t flash
2. With headlights on- you can barely notice flash from rears, but brake lights are a lot brighter.
 

Forum statistics

Threads
44,346
Posts
954,875
Members
36,583
Latest member
beltorres07
Top