Dashlight Gremlins
Thread Starter
|
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
Dashlight Gremlins
Last night my dash lights started acting funny. The right turn signal indicator light came on while driving. It was bright and constant. Moving the signal switch arm to the right turn position provided normal operation but when the turn signal switch was returned to the center position the light came back on bright again. The next time I started the truck, the light was on again but now much dimmer. Any ideas appreciated.
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
Senior User
Joined: Jul 1999
Posts: 472
Likes: 1
From: USA
Dashlight Gremlins
[font size="3" color="#191979"]
Check and see if the front & rear turn signals are doing the same thing at the same time. If so, the problem might be in the turn signal switch or the wires between the switch and the lights.
If it is just the instrument light and the front & rear turn signals are OK, then pull the instrument cluster and check the printed circuit on the back of the instrument cluster. If I remember right, the instrument cluster lighting bulbs are adjacent to the turn signal bulbs. Bad ground connections can do wierd things.
Art
Check and see if the front & rear turn signals are doing the same thing at the same time. If so, the problem might be in the turn signal switch or the wires between the switch and the lights.
If it is just the instrument light and the front & rear turn signals are OK, then pull the instrument cluster and check the printed circuit on the back of the instrument cluster. If I remember right, the instrument cluster lighting bulbs are adjacent to the turn signal bulbs. Bad ground connections can do wierd things.
Art
Posting Guru
Joined: Feb 2000
Posts: 1,100
Likes: 0
From: Wichita USA
Dashlight Gremlins
Check the bulbs and operation of the lights on the effected side, looking for bad grounds or possibly a filament broken and laying on the other which will cause back feed from one circuit to another.
2000 XLT Flare Supercab Sport 5.4-Auto-355LS-Tow pkg-Bedrug-Xtang Tonneau
2000 XLT Flare Supercab Sport 5.4-Auto-355LS-Tow pkg-Bedrug-Xtang Tonneau
Moderator
Joined: Jan 2001
Posts: 56,973
Likes: 2,731
From: Virginia
Dashlight Gremlins
My truck was doing this and I had to take out the front turn
signal bulbs and scrape the bulbs and socket connections. Like
the others said, it must be a bad ground on the front bulbs.
signal bulbs and scrape the bulbs and socket connections. Like
the others said, it must be a bad ground on the front bulbs.
Thread Starter
|
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
Dashlight Gremlins
Thanks guys. It turned out to be just as you said. Bad bulb with crossed filaments and corrosion in the socket. Problem fixed. I also applied this advice to my daughters 66 mustang and she now has fully functional dash lights.
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
Thread Starter
|
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
Dashlight Gremlins
[font size="1" color="#FF0000"]LAST EDITED ON 14-Feb-01 AT 09:38 PM (EST)[/font][p][font size="1" color="#FF0000"]LAST EDITED ON 14-Feb-01 AT 09:38 PM (EST)[/font]
>What else is on the dashlight
>circut? Seems that dimming lights
>in the dashboard are commonplace.
>I've got dashlights, but they're
>not glaring like they use
>to.
There is a voltage regulator(something like that) on the back of the instrument cluster. Let me know if you need the procedure for troubleshooting this item.
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
>What else is on the dashlight
>circut? Seems that dimming lights
>in the dashboard are commonplace.
>I've got dashlights, but they're
>not glaring like they use
>to.
There is a voltage regulator(something like that) on the back of the instrument cluster. Let me know if you need the procedure for troubleshooting this item.
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
Trending Topics
Moderator
Joined: Jan 2001
Posts: 56,973
Likes: 2,731
From: Virginia
Dashlight Gremlins
The instrument regulator is for the guage/sending unit circuits
only, not the dash lights. The dashlights run off a potientometer made into the headlight switch. I would mess with the headlight switch **** and see what happens.
only, not the dash lights. The dashlights run off a potientometer made into the headlight switch. I would mess with the headlight switch **** and see what happens.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
Dashlight Gremlins
Please excuse that previous post. Where could my brain have been? Gremlins in the brain now. You are right of course, the guage regulator has nothing to do with the dashlights.
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
1977 F-100
300 I-6 / C-4
Offy intake w/holley390
Hedman headers w/duals
MSD6
Whiter whites/Brighter brights
