Question about Mazda Cars & Trucks
High resistance = low currant flow = dim lights ! The way a professional automotive Tech goes about finding the problem is by using voltage drop testing to see which side of the circuit has the problem , B+ or ground ! Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Posted on Dec 06, 2016
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Posted on Jan 02, 2017
SOURCE: Driver side headlamps very dim
trying to solve the same problem, novice back yard machanic, if your an expert you would know there is no ground to the headlight bulb there is a small current and a large current and the ground is in the Turn/hazard headlamp switch assembly and in the daytime running lamps relay. Still can't find the relay though I think it's bad think it's under the dashboard still tryng to find it, I keep hearing a clicking sound under the dash behind the fuse box taking apart the dash to find problem will keep you updated.
Posted on Apr 21, 2010
SOURCE: I have a 2008 f250.
I am sure that a 12 Volt bulb means it needs 12 Volts. Since you changed the bulb to the other side, why not check the voltage in the working side and see what it reads?
Sometimes the turnstalk can interfere with the lighting. Try pushing the Hazard switch several times and see if the headlights straighten out. I read that too much goes through the turnstalk and that using the Hazards can derail a contact inside the stalk.
If this does not help, you may need a headlight relay in the powerbox. One contact may be dirty or burned down for the wire it feeds. Unless you have a single wire feeding both low beams to the headlights, I would bet the left and right side come out directly through the relay.
Posted on Oct 20, 2010
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