lild

Lowbeams stop working, highbeams, marker lights and tail work checked the two fuses spots for headlights and there is no power on either side of the fuses no line or load .i don't have daytime driving lights so the lowbeam work off of the fuses not relays, what would be the next things to check?

cjcnomor4

if you DONT have autolamps put a jumper wire between the dark blue/orange wire and the red/black wire at the 10 pin connector at the multifunction switch. if the lights come on you have a bad multifunction switch. if not check fuse 40, then check the red/black wire and the dark blue/orange wire between the multifunction switch and central junction box. if the fuse is ok and the wires have continuity the central junction box is bad.
If you have autolamps theres a check for the vehicle security module.

lild

I replaced the multifunction switch still no power at the fuse panel, i put a jumper between the headlight switch and 23 and 25 space in fuse panel for the low beams, still low beams don't come on. any advice would be appreciated before going broke sending it to the dealer

cjcnomor4

do you have autolamps?

lild

yes i have auto headlights an at night in this position everything turns on except lowbeads.

cjcnomor4

start by checking power at c3008 at the vehicle security module. pin 1 dark blue/orange. should be more than 10 volts key on. its on the back wall of the cab for supercab/crew cab or on the b pillar left side for a regular cab. if you dont have power theres a problem with the fuse or that wire. if you do have power check pin 9 red/yellow with the headlamp switch in the headlamps on position. if you have power it has a bad vehicle security module, if not you have a fuse or a problem with the red/yellow wire. Let me know what you find.

lild

i have power at the headlight switch and when i turn the switch to manually turn them on the yellow and red wire becomes hot

cjcnomor4

at the security module?