[sbianco]

Would you rule out the multifunction switch and the flasher? Should I buy a flasher anyway?
I was going to start with replacing bulbs and inspectiing for water leakage at the wiring harness (missing/corroded rubber seals, etc.) Again I have not confirmed it is water (don't drive the truck everyday/work in another state w/o truck). So, I was going to order all the bulbs for the truck (online) and replace them. Not even sure I know how to change the fronts bulbs (remove battery?). Anyways I'll let you know and thanks for the feedback

 

[sbianco]

Update: Blows fuse #18 immediately after starting truck (no rain involved). Includes hazards. Where the wiring under the truck? I imgine it has plastic corrugated sheathing

 

[sbianco]

FIXED- Replaced Multifunction Switch
(1) bought Multifunction Switch from Rockauto with 5% discount (Standard products ~$70) (2) Blocked truck wheels & disconnected battery (3) removed igintion (3) removed steering column plasic cover (2 of the 3 philip screws were missing - that took some time to figure out (they fell out I guess) (4) moved the top cover out of the way (4) replaced the Multifunction Switch.

 

[Btravelen]

This a somewhat confusing system. What happened to the simple, separate turn signal and hazard flashers.

My turn signals stopped working awhile back. I researched and found the flasher relays. I pulled the black EP27 and re-seated it and they began working. Lately they quit again and I ordered a new EP27. In the meantime, I removed the old black relay from the socket. I then tried the turn signals and they worked for a short while before they quit working again, WITH THE RELAY REMOVED! I began to wonder if I ordered the right one, but upon receiving it and installing it, the turn signals work. The only problem with the replacement is that it's as big as the blue relay next to it and the cover doesn't fit over them.

I suppose I could have gone to Ford and picked up the overpriced unit from them but there are reasonably priced alternatives for replacement.

BTW, I saw a YouTube instructional video of a guy who tore his dash apart to replace it. It's easilly reachable from beneath by a nimble owner..

**UPDATE!

I decided to disassemble the old black EP27 and see if I could see a problem. I used a cleaning cloth and some contact cleaner and cleaned all the contacts in the relay. The cloth can be slipped between the contacts fairly easily. When I couldn't see anything else obvious, burning or other, I reassembled it and re-installed it. Turn signals worked. The dirty contacts seem likely to have caused the intermittent problem before it quit completely. Might be worth a try if your TS quit or become intermittent, before replacing the relay. Take Care

 

[ejrejr]

Try multifunction

Would you rule out the multifunction switch and the flasher? Should I buy a flasher anyway?
I was going to start with replacing bulbs and inspectiing for water leakage at the wiring harness (missing/corroded rubber seals, etc.) Again I have not confirmed it is water (don't drive the truck everyday/work in another state w/o truck). So, I was going to order all the bulbs for the truck (online) and replace them. Not even sure I know how to change the fronts bulbs (remove battery?). Anyways I'll let you know and thanks for the feedback

1999 F350 7.3 lifted 4X4 My .02 cents
Mine started out with the right rear flasher not working, only when it was wet and cold out. It progressed to the right rear brake light not working, and then no lights working at all in the rear. I replaced the multifunction switch and it corrected it. Also check your drivers side windshield seal for leaks, know problem. It leaks into the fuse panel causing many strange electrical problems.

BTW instructions say you need to removed the dash cover the replace multifunction switch, but is you removed the 3 bolts under the steer in column and slide out the ignition switch you should be able to wiggle the top cover off. The replacing the MFS is pretty easy. Use some electrical contact cleaner on it as well.

 

[Gabogabo34]

no turn signals!

I've got a 2000 (built 10/99) f350 SD with the 7.3. neither the turn signals nor 4-ways work. I've tried checking fuses, replacing the flasher relay, and replacing the multifunction switch but to no avail. does anybody have some advice or at least some wiring diagrams that may help me out?
:ford:

 

[sbianco]

My Solution was:
I was hit from behind (minor) but the wires at the trailer hitch took 9 months to wear and short out. Maybe the auto-body shop didn't install all the wire clips or maybe it was a NE weather and my use of the hitch but eventually a short occurred at the hitch. Suggest every body with this problem inspect the wires around the hitch and back bumber

 

[ford truck 99]

flasher issue

i have a 1999 f350 and the front flashers do not work I replaced the bulbs and still nothing. The back work but blink fast. what could be the cause of the front not working ? The parking lights work fine. I checked all the fuses and they are fine.

 

[mwsowers]

I had my left and right turns go out instantly late at night.
Read all these forums. I had 4 ways, all bulbs work, brakes and everything works but turns signal-no lights on dash or clicks from blinker when flicking left or right, but they work in 4 way.
SOLUTION:
1. Bad wiring, grounded out, or broken wire. Highly unlikely unless major up and down on wheel tilt. Check for wires in column.
2. Bad flashers. 2003 f250 6.0 Diesel has a flasher under the radio up under the dash in a black little case 3"x2". took cover off and its a blue flasher inside 5 point. found 2 relays or flashers under the hood in a small black box tight up to the firewall drivers side, took top off and inside is 2 flashers and or relays. - turn on 4 ways and feel around til something clicks to identify locations FYI.
3. Multi-turn lever AKA lever on the wheel/column that you touch to make a signal can go bad. theres a lot of contacts and conection points in those and they are heavily used.

MY SOLUTION- identified no bad frayed or broken wires, then checked that flasher under dash- no tools required fyi. Then checked relays in hood, all bulbs ok too.
pulled the column apart, figited with the lever and the housing where the wires plug in it, and whala! There is either corrosion and or a contact that is not tight at a connection or loosening inside. IU have drove for 2 days now no problems.

Run this thru and replace flasher, relays first then multilever switch if nothing works.

 

[dzavelson]

I know this is an older thread, but thought I would post in the hope that it might be helpful to others.

I had a similar issue on my 2000 Excursion 7.3L with the turn signals not working but the hazards working perfectly. The turn signals had been gradually failing over the last few months - going from mostly working to mostly not working. In the end when I would turn on my left or right turn signal I would get one flash and then nothing.

After reading this and other threads about similar failures I figured it had to be the Multi-Function switch and went ahead and replaced the stalk with a new one. That didn't fix it. I removed the radio and reached back into the dash to find the flasher module. From there I could feel it clicking when the hazard flashers were triggered and that worked consistently and perfectly. But when I would trigger the turn signal I would feel nothing. I removed and cleaned the contacts and still nothing....

As a last resort I figured I would replace the flasher module even though the same module seemed to work fine with the hazards. SUCCESS! So it seems there must be separate circuits or something inside the flasher that would allow the hazards to work but not the turn signals.

So if you are having intermittent or non-functioning turn signals but hazards working, it still could just be the flasher module. Hope this can help others.

 

[Danoracing]

What I found

My turn signals and flashers stopped working, I checked all the fuses and swooped the multi function switch out changed the flasher relay and still nothing worked. With the hazard lights on I went to pull the fuse out again to recheck it. When I wiggled the fuse they started working! Took fine sandpaper and cleaned the fuse and put dielectric grease on it, seems to be fixed. Hope this helps somebody out. :smile2:

 

[ford_doctor]

For the record, on this 1999 F350 the electronic flasher relay is in the instrument panel fuse box and is a high failure rate item with regard to turn signals and hazard lamps. If it is factory or a genuine Ford replacement it is blue. The second most common cause is dirt getting into the hazard switch because it tends to collect dust and dirt being on top of the column. The best way to see if this is the case is to exercise the button several times to see if the lights begin to function again. Also, with this system, it is important to note that the brake light feed from the BOO switch and the left and right and left turn/hazard feed circuits all have their own poles inside of the multifunction switch passing through the hazard switch first. What this means is that with a dirty witch you could have just one or both signals not working with or without brake lights... or any strange combination. Food for thought.

 

[Cooldealpickle]

Whether I try the left or right turn signals on my 1999 F-350, nothing happens. The brake lights work, the hazards work, and the parking lights work. It seems that with the exception of the turn signals, everything in all four corners work.

Inside the turn signal lever feels crisp in both directions, so I don't think it's the multifunction switch. No signal indicator on the dash and no clicking sounds, although the left and right arrows do illuminate when the hazard lights are turned on.

I checked the fuses in the cab and under the hood. I do not see in my manual a relay listed that would control the signals only.

What should I check next?

I know this was years ago, but it may still help somebody.
I have a 99 f250 super duty. My signals wouldn't work, but hazards and everything else would. I had good continuity from switch to relay and from relay to fuse panel. Had power at 10a fuse 23 under dash. (Far right-second one down) It will only have power when in run. White wire with light blue stripe from fuse panel to relay for signals. Light blue wire(#44) from relay to signal switch. Found that the fuse read good power, but when I'd let off it would lose connection. The fuse socket was loose inside. I could move the fuse and signals would work. I broke a prong off a bad fuse and jammed the fuse up against the loose one and tightened it up. It'll do for now. Pain in the butt to find though. I hope this helps. Not sure if the wiring and fuse details are the same on your truck.

 

[Pittendrigh]

For the record, on this 1999 F350 the electronic flasher relay is in the instrument panel fuse box and is a high failure rate item with regard to turn signals and hazard lamps. If it is factory or a genuine Ford replacement it is blue. The second most common cause is dirt getting into the hazard switch because it tends to collect dust and dirt being on top of the column. The best way to see if this is the case is to exercise the button several times to see if the lights begin to function again. Also, with this system, it is important to note that the brake light feed from the BOO switch and the left and right and left turn/hazard feed circuits all have their own poles inside of the multifunction switch passing through the hazard switch first. What this means is that with a dirty witch you could have just one or both signals not working with or without brake lights... or any strange combination. Food for thought.

Same problem on my 2002 F250. The plug lug was broken off so the whole plug was floating.
I managed to zip the it back in place. Now I can tilt my steering column and not loose my indicators.
Thanks all.