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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

dim brake lights

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Old Oct 2, 2004 | 01:12 AM
  #1  
kayladog1's Avatar
kayladog1
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From: victoria canada
dim brake lights

Brake lights are dim. Checked with meter. Only getting 8-9 volts to the brakelights. Tailights have 12V. Have 12V at brake light switch. Have tried tracing this but can't find where voltage loss would occur. Any suggetions.
 
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Old Oct 2, 2004 | 06:47 AM
  #2  
Freightrain's Avatar
Freightrain
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From: Ohio
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There is a plug at the rear frame on driverside, might be crusty there??
 
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Old Oct 2, 2004 | 06:50 AM
  #3  
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jowilker
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From: Creedmoor, North Carolina
Club FTE Silver Member

Dirt or corrosion, is likely the culprit. Do ya have one of those combo battery brushes? Try running the cable end into the socket and giving it a few turns.

let us know

John
 
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Old Oct 2, 2004 | 11:44 AM
  #4  
4x4Subaru's Avatar
4x4Subaru
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Also use the brighter bulb. Yours are probably still 1157. I can't remember the number 21??. They look the same just a bigger number.
 
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Old Oct 3, 2004 | 01:59 PM
  #5  
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rebocardo
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From: Atlanta GA
DIsconnect the harness under the hood and see if you have 12v going out of the dash harness. If not, the cause might be the directional switch. Otherwise the brake connector under the hood or the wire from it is bad.

Check for a good ground at the light.
 
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Old Oct 3, 2004 | 05:04 PM
  #6  
Faithful Old Road Dog's Avatar
Faithful Old Road Dog
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From: california
My vote would be the dirty, crusty, rusty light socket.
 
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