Fuse Panel Location 2003 Marquis

[Steve Huber Co-Admin]

MJ,
A number of things could be going on.
If you haven't already, replace the porch light bulb with a new one. The filament could show continuity but still have a path to bulb ground.
See if you have 12V on TB 1, 11 or 12 with the bulb removed. If not, the 12v source (to either TB 1, 11 or 12) is missing. One wire on TB1-11 goes to R14, pin 30. One wire on TB1-12 goes to R14 pin 87. Remove those 2 wires from the TB and see if you have 12v on either TB1-11 or 12. If you do, I suspect R14 is faulty. If not the source is bad and you'll have to trace the wire remaining on the TB.
Also, check that you have 12v at both terminals on CB12. It supplies 12v to the R14 coil.
Steve

[Michael Hannan]

Thanks Steve.  I'll pick up a new light bulb while on on the main island tomorrow.  I already have a new relay if that's the problem.

MJ

[Michael Hannan]

Well I did all that you suggested Steve and then some.  I do have a porch light again but it's a workaround & not a fix.  There isn't any power at TB1 11 or 12.  I checked R14 anyway and it showed some heat discoloration on one of the terminals so I replaced the relay.  Still nothing.  I moved the TB1 11 & 12 wires to other terminals that had power.  Still nothing.  I checked the voltage coming into R14 and 3 showed 14+ volts and one showed 2.3.  I checked the voltage at the switch for the light and it was good.  There's a switch on the light itself that looked like it had seen better days.  I cut it off and joined the wires and the light works.  The light on the step still isn't but I suspect it needs a new bulb.  So, I still don't know why there isn't power at TB 1 11&12 but for now I have light.

Thanks for your help Steve.

MJ

[Steve Huber Co-Admin]

MJ,
If you checked R14 prior to moving the wires on TB1 and found 12V on 3 of the 4 connections, something is mis-wired as you should have also found 12 V on one of the TB1 terminals, probably TB1-12. Attached is the wiring for R14. BTW, how many wires are on R14?
Steve

[Michael Hannan]

I checked the voltage of the wires before attaching them to R14 but after moving TB1 11 &12.  There are 4 connection to R14.I'll have to snip the wire ties and follow the wires from R14 to their source and compare to your schematic.  So are both TB1 11 & 12 supposed to have voltage?  I'm thinking yes but the switch between the two in the schematic has me confused.  Not a difficult thing to do. LOL

MJ

[Steve Huber Co-Admin]

MJ,
One should have 12v all the time, TB1-12 I think. The other should get power when the  light switch is on which triggers the relay's contacts (switch) to close and thus supplies voltage to the light.
Steve