Tail light issues

Yes, installed by Tiffin.
Ford has two fuse blocks. One under dash and other under hood/doghouse.
Does the rig have lamp outage function?
Splice under hood/doghouse?

There are 2 fuse boxes for Ford. The one outside by the engine oil fill and the one inside by the emergency brake pedal on the firewall. There is a fuse for each light. The sockets are part of the Ford wire assbly. The wire harness's GOING TO all 4 outside corner lights are FORD harness also. This is where a voltmeter or 12 volt test light comes in handy. Instead of just replacing a bulb, you make sure you have power AND ground to the bulb socket. Doug

Okay found the fuses inside the coach. Checked each bulb socket and all have current. Only saw one fuse for daytime lights. Fuse okay

You are not looking for daytime lights. You need to look in owner's manual or this manual 64-75
Many are wired into the trailer tow fuses. Test all the fuses with test lamp is the easiest.

Checked all fuses inside and out. Turned on lights has voltage but passengers side tail lights still not coming on.

dsisemore1 wrote:
Okay found the fuses inside the coach. Checked each bulb socket and all have current. Only saw one fuse for daytime lights. Fuse okay

If all sockets have current then you have a bad ground. Can you easily pull the light fixtures off and see what's behind them?

opnspaces wrote:

dsisemore1 wrote:
Okay found the fuses inside the coach. Checked each bulb socket and all have current. Only saw one fuse for daytime lights. Fuse okay

If all sockets have current then you have a bad ground. Can you easily pull the light fixtures off and see what's behind them?

Bingo. SWAP the Drivers side BULB to the INOP Pass side socket. IF it does NOT work but the Turn and Brake do, then the socket is bad(ground connection in the socket is bad) and you have to replace the socket. I believe you can get replacement sockets in the "help" section of auto parts stores like Auto Zone. Doug

PS if the Brake and turn signal work, then the ground TO THE SOCKET assbly is there, just not to the Running light pin in the socket.

Thanks for all the help. Will work on again tomorrow and let you know how it works out. 1,500 miles from home and supposed to be on vacation .

Where are you?

Jackson, Wyoming