77 instrument cluster
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From: Jackson,Tn
77 instrument cluster
in my 77 the lights in the instrument cluster wont work and ive tried to differnt thangs and they still wont work ....but all the guages work just not the lights on them ....has anybody else had this problem ? wat could be wrong with it ?
apprciate the help
apprciate the help
Post Fiend
Joined: Jan 2006
Posts: 5,037
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From: Kasson, Minnesota
Make sure your light switch is rotated to the correct spot. If it's turned clockwise (I think) than your lights will appear to be off.
Did you check all the fuses?
Sometimes in the back of the cluster get corroded and the connection isn't as good.
Could be that your light switch is bad.
Did you check all the fuses?
Sometimes in the back of the cluster get corroded and the connection isn't as good.
Could be that your light switch is bad.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Everything works but the dash lights? Could be the rheostat in the headlamp switch. When you turn the ****, that activates the rheostat, which brightens or dims the dash lights.
D7TZ-11654-A Headlamp Switch (Motorcraft SW-1381)
Replacing the switch is simple...disconnect battery cable, pull out headlamp ****. Reach under dash, find the switch. On the bottom, there's a button, push it in, and pull **** and shaft from the switch. There's a plastic nut that holds the switch to the dash, remove it..carefully, and switch will drop out. Unplug the loom, re-install in new switch, reassemble. It's not necessary to push the button again, just push the **** and shaft into the switch.
D7TZ-11654-A Headlamp Switch (Motorcraft SW-1381)
Replacing the switch is simple...disconnect battery cable, pull out headlamp ****. Reach under dash, find the switch. On the bottom, there's a button, push it in, and pull **** and shaft from the switch. There's a plastic nut that holds the switch to the dash, remove it..carefully, and switch will drop out. Unplug the loom, re-install in new switch, reassemble. It's not necessary to push the button again, just push the **** and shaft into the switch.
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From: Jackson,Tn
ok thanks fellas ill do all of that tomromorw and see wat i come up with ...i know i got it turned so there on
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From: Jackson,Tn
not the fuse and the plug aint corroded ....so were can i get a switch at ? and how much are they ? ...and if it dont fix it im takin it back ....but if u thank about it , the lights on the heater and stuff wont work either and they work right now ...so theres must be somthing wrong with the cluster ....
can the plug on the back go bad ?
can the plug on the back go bad ?
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Post Fiend
Joined: Jan 2006
Posts: 5,037
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From: Kasson, Minnesota
Yep...Like Dennis said..
I have looked at many fuses and even replaced fuses because they "looked" good and ended up spending a lot of time wondering why things didn't work. I probably ended up going in a circle replacing bad fuses with bad fuses and good fuses with bad fuses...Well you get the picture. Test it with a meter or test light.
I have looked at many fuses and even replaced fuses because they "looked" good and ended up spending a lot of time wondering why things didn't work. I probably ended up going in a circle replacing bad fuses with bad fuses and good fuses with bad fuses...Well you get the picture. Test it with a meter or test light.
Senior User
Joined: Feb 2007
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I had this exact problem when I bought my '76.
Either the instument cluster flex circuit was replaced, or the harness was replaced by the previous owner. One of the two was for the incorrect model (Ranger vs Custom). When I traced the red/blue wire into the instrument cluster, it dead-ended at a point in the flex circuit that had a spot for a bulb, but the cluster did not have a hole for a bulb.
The fix: I traced the circuit lines on the cluster to a place in the plug. There wasn't a wire there. So I moved the dead-end blue/red to that spot. Done.
Wish I would have figured that out before I replaced all the bulbs, sockets, and headlight switch.
Either the instument cluster flex circuit was replaced, or the harness was replaced by the previous owner. One of the two was for the incorrect model (Ranger vs Custom). When I traced the red/blue wire into the instrument cluster, it dead-ended at a point in the flex circuit that had a spot for a bulb, but the cluster did not have a hole for a bulb.
The fix: I traced the circuit lines on the cluster to a place in the plug. There wasn't a wire there. So I moved the dead-end blue/red to that spot. Done.
Wish I would have figured that out before I replaced all the bulbs, sockets, and headlight switch.
Post Fiend
Joined: Jul 2004
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From: Northern California
Originally Posted by czaroc
Either the instument cluster flex circuit was replaced, or the harness was replaced by the previous owner. One of the two was for the incorrect model (Ranger vs Custom). When I traced the red/blue wire into the instrument cluster, it dead-ended at a point in the flex circuit that had a spot for a bulb, but the cluster did not have a hole for a bulb.
It does matter what year the truck is however, as some of the years were "rewired" drasticly from the others.
It sounds like the cluster back was replaced due to cluster rot. If you post the numbers off the printed circut, one of us here can tell you if it is compatible with your year of truck, or which cluster back would be correct for your truck to make it fully functional they way the cluster should be etc... It's possible that some of the warning lights are not hooked up correctly even now.
hope this helps...
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From: Jackson,Tn
the owners manual says " INSTR.PNL. & CLUSTER LAMPS, ASH TRAY , TRANS IND. LAMP , RADIO LAMP , HEATER , A/C LAMP , HEADLAMP & W/S WIPER ILLUM. ( 3 AMP ) "
so if it says that ...none of them other lights would work and they do ....so its something to do with the cluster not the fuse , im just gonna buy me a little light at walmart and mount it somewere and let it light up the speedometer b/c i dont need none of that other stuff at night.... thanks fer all the help fellas
so if it says that ...none of them other lights would work and they do ....so its something to do with the cluster not the fuse , im just gonna buy me a little light at walmart and mount it somewere and let it light up the speedometer b/c i dont need none of that other stuff at night.... thanks fer all the help fellas