high beams not working
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
It's not the MFS since the cluster indicator works and it's in parallel with the main headlight high beam circuit. It's also not the fuse since the power for the indicator is tapped off after the fuse.
It's either a wiring fault or two bad bulbs. Get your meter or test light out and test the light green/black wire at each bulb to see if power is being delivered to the bulb socket.
It's either a wiring fault or two bad bulbs. Get your meter or test light out and test the light green/black wire at each bulb to see if power is being delivered to the bulb socket.
Thread Starter
|
New User
Joined: Jan 2015
Posts: 9
Likes: 0
From: St Louis
I tested the wires at the headlight and at first I tested voltage on low beams to make sure I had the right wire, then I turned the high beams on and at first they weren't on, when i tested for voltage it was around 13 volts, then I looked at the driver high beam and it was on, I'm not sure what's going on here. Now they are both working. Is there a relay that could be bad? Thank you everyone for all your help.
Fleet Owner
Joined: Aug 2010
Posts: 21,253
Likes: 1,656
From: Reynoldsburg, Ohio
Could be the bulb sockets have become corroded and losing contact. Either clean or replace them, use a dab of dielectric grease on the contacts to prevent this in the future.
Dorman also make "high temperature" replacement sockets with a boot covering the bulb contacts, enclosing the connector inside a protective covering.
Dorman also make "high temperature" replacement sockets with a boot covering the bulb contacts, enclosing the connector inside a protective covering.
Thread Starter
|
New User
Joined: Jan 2015
Posts: 9
Likes: 0
From: St Louis
Trending Topics
Thread Starter
|
New User
Joined: Jan 2015
Posts: 9
Likes: 0
From: St Louis
Could be the bulb sockets have become corroded and losing contact. Either clean or replace them, use a dab of dielectric grease on the contacts to prevent this in the future.
Dorman also make "high temperature" replacement sockets with a boot covering the bulb contacts, enclosing the connector inside a protective covering.
Dorman also make "high temperature" replacement sockets with a boot covering the bulb contacts, enclosing the connector inside a protective covering.
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
Thread Starter
Forum
Replies
Last Post
streks
Explorer, Sport Trac, Mountaineer & Aviator
11
Feb 2, 2014 01:33 AM
ojh
1948 - 1956 F1, F100 & Larger F-Series Trucks
15
Oct 11, 2013 08:35 PM