Headlight switch

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WileE7

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Recently I've been having an issue with my lights. I have to play with the headlight switch and find the sweet spot to get both the head and parking lights on at the same time. the parking lights will ome on when i set the switch to that setting.The lights on the dash board are out also they were working last week. I bought a new switch thinking that would help but the parking lights dont come on at all whe i try to turn the parking lights on or when I pull the switch to have both sets of lights on. I put the old switch back in and i can get the parking lights come on but i have to play with the switch to have all of the lights on. My interior lights haven't come on since ive had my bronco and Ive new light bulbs

 

Rons beast

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Sounds like you may have wires loose and/or a bad ground in the connector to the headlight switch. Could be corrosion too. Check all that and then remember you still could have a bad "new" switch. There is a lot of China junk being sold out there.

While you are at it, it would be wise to check all your grounds.

BTW you didn't mistakenly turn the interior dimmer all the way to dark did you? I did on my Mercedes and had the gauge cluster out to change bulbs before realizing what I did...so it happens.

Good Luck

 

miesk5

96 Bronco 5.0
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yo WileE7,

Head Light (HL) Switch to Dimmer and to HLs & High Beam Indicator (in Instrument Cluster) Wiring Diagram in a 90 5.0

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=57174

Grounds are G100 & G101 for HLs; G201 for High Beam Indicator

HL Switch to RADIO  Wiring Diagram in a 90 5.0

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=17408

HL Switch to Front Park Turn Lights Wiring Diagram in a 90 5.0

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=57164

Grounds G100 for left (driver side) Lights & G101 for right lights

btw G100 also serves license light & rear stop/turn lights as well as HLs

HL Switch to Instrument Panel, Ash Tray Lights, Radio LCD, Rear Window Defroster, etc.

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=57179

G201 (please confirm, my eye sight is blurry)

see other system & sub-sys diagrams as well as TSBs at http://www.revbase.com/BBBMotor/

I'll post for now and look # Grounds later or WED.

 

miesk5

96 Bronco 5.0
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yo,

Fuse Block Diagram in a 90
Source: by ElKabong (Ken, El Kabong)

100_2691.jpg

GROUND Locations in a 90 from 90 Bronco EVTM;

"...G100 LH side of Radiator support;

G101 RH side of Radiator support;

G102 RH side of Radiator support;

G103 LH rear side of engine near knock sensor;

G104 LH rear side of engine compartment, near electronic engine control (EEC) module, on the left fender close to the firewall; G105 LH Side of engine;

G106 RH fender apron, near voltage regulator;

G107 RH fender apron, at starter relay; G108 RH fender apron, at voltage regulator; G109 RH fender apron;

G201 LH rear side of I/P (looking at the diagram it is at the bottom of the driver's side dash assembly. Screwed to the bottom edge, just to the left of the steering column. It is the ground for the instrument cluster);

G202 Behind RH cowl panel;

G203 RH rear side of radiator support;

G204 On steering column;

G205 Behind Center of I/P (Dash); near speed control amplifier;

G400 LH side of cargo area; near rear light assembly;

G401 Below LH side of cargo area; near crossmember;

G500 Inside driver's door; near left door speaker"
Source: by BroncoJoe19 (Joe) at Ford Bronco Zone Forums

http://broncozone.com/forums/index.php?showtopic=15413

 
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