[prairiefire]

I'm a volunteer with my fire department and just bought a 2005 Titan. It has a topper on it. I'd like to hang an amber light bar in the back window of the topper and wire it to my hazard lights so all blink at the same time -- for use when stopped on scene to warn of hazards.

I'd appreciate any suggestions as to how to wire it to that switch and circuit. I'll use an LED bar. Will it need its own relay or can I just rely on the hazard light relay (I'm assuming there is one, somewhere).

Or, should I wire it independently with its own switch? If so, how would you run the wire from the power source to get it into the topper?

Suggestions will be deeply appreciated.

Thank you.

sjh

 

[Smccarty3]

It would depend on the light bar and the current it needs. What I would do is run a fused power wire from the battery under the truck, you can get into the bed under the bed rail by the taillights. Then I would run a relay and tap the wire for 4 ways to trigger the relay. It should blink with the 4 ways on then. Now the only issue I can see is that without a switch it will probably blink with the turn signal as well.

 

[FishnAlaska]

I would do as above, but run it to a switch inside the cabin rather than tap into the lights. I have flush mounts in my rear bumper that are ran by a switch inside the cabin. Run power to the switch from an add a fuse into the fuse box by the glove box. Wire out through the firewall using the hood release grommet to your relay. Fused Hot wire off the battery to the relay, then to the back following the OEM wiring harness, then up through the taillight into the bed
http://www.titantalk.com/forums/tit...t-leds-rear-bumper.html?highlight=flush+mount

 

[prairiefire]

Fishn, Thanks for that very clear and complete tutorial. Well done!