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Kit7873
11-08-2018, 05:33 PM
Hi everyone,

I have a 2004 T1, love the van, but just this week on MOnday, my turn signals began to crap out --- first blinking intermittently (Monday) to blinking quickly and then not blinking or clicking at all (yesterday) to this morning's commute of not even working. Perhaps I get one blink and then it stops. This is for both R and L.

Any insight would be greatly appreciated!

Kit

ECU
11-08-2018, 06:09 PM
I'll put money on the Multi-function switch. Can you wiggle the turn signal switch to make it work? I found that rotating the stock with a little bit of force could make the signal work momentarily. I had it replaced.

Kit7873
11-08-2018, 06:14 PM
Thanks for the reply. I haven't tried wiggling the turn signal switch, but I have been clicking it on and off repeatedly when turning as I can perhaps get a single click of the turn signal with each pull on the switch. I will search for multi-function switch.

Much appreciated,
Kit

NelsonSprinter
11-08-2018, 06:24 PM
I'd check the bulbs for burn out.
If bulbs ok, I'd push down on the emergency flasher button while pushing up on the steering column's fuse box to make sure the turn signal switch's connection hasn't loosened apart from years of vibrations and bumps

autostaretx
11-08-2018, 09:01 PM
There was a recent thread on disassembling the multi-function switch and bending the contacts to adjust for worn plastic bits:

https://sprinter-source.com/forum/showthread.php?t=10876

--dick
p.s. and seeing Bob's approval of NelsonSprinter's comment: yes, try the Hazard flasher to see if it's switch or elsewhere.
The Central Timer Module could be having issues (or its relays)

p.p.s. wiring diagrams for the switches are spread around in the service manual in chapter 8W
Both the "Front Exterior Lighting" and "Rear Exterior lighting" have bits of it.
(we've also identified some errors (primarily missing connections in the drawings) in the "headlamps" section)

Bobnoxious
11-08-2018, 09:35 PM
I'd check the bulbs for burn out.
If bulbs ok, I'd push down on the emergency flasher button while pushing up on the steering column's fuse box to make sure the turn signal switch's connection hasn't loosened apart from years of vibrations and bumps

:thumbup: X-2 Yes, always begin with the easy and least expensive stuff first, progress from there.

Midwestdrifter
11-08-2018, 10:34 PM
The relay on the fuse block one (or the fuse blocks relay contacts) can also cause erratic operation. Usually in the form of buzzing relay etc.

Kit7873
11-09-2018, 12:40 AM
Thanks for the feedback. Hazards are working as of now. They may have a slight lag/irregular timing pattern but it is almost imperceptible and perhaps just my imagination!

outbound
11-09-2018, 01:33 AM
try put the e-flashers ON and if they arent flashing, give the panel immed below the wheel a whack and see if that doenst make it flash..
then if the flashers go, shut em off and try the turn sigs...

(seriously, it usually works with mine :)

Midwestdrifter
11-09-2018, 01:40 AM
If the flasher relay in the fuse block (or the block itself) is starting to go, the next relay over is the ECU relay, so watch out for no start situations with "start error" messages.

veganxxx
11-09-2018, 05:06 AM
I have had multiple fuse block housings go bad, where the turn signal relay becomes too lose to make contact.

Aqua Puttana
11-09-2018, 12:32 PM
I have had multiple fuse block housings go bad, where the turn signal relay becomes too lose to make contact.
There's what is, in my opinion, marginally designed solder point which isn't up to the stresses it sees during service.

With a bit of solder ability there is an easy DIY fix.

https://sprinter-source.com/forum/showthread.php?p=374375#post374375

vic

mrawsonw
11-09-2018, 01:37 PM
I have an intermittent problem with my turn signal relay and a loose connection inside the fuse box. I'm pretty sure that if your hazards are working, the problem is with the "multifunction switch" (turn signal stalk. If your hazards don't work, it's more likely to be the turn signal relay or fuse panel.

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Missouri Blue
11-09-2018, 01:57 PM
An easy test would be to switch the engine start relay (the one on the left at the bottom of the fuse block #1) with the turn signal relay (the one on the right). Years ago my turn signals starting acting wonking in the cold. I switched the two relays and didn't have problems with starting or turn signals for 2 years. Just last week my van wouldn't start intermittenly (aux fan on, glow plug light not going out, etc.). Wiggled the start relay and it started up, but would die if I didn't hold the relay just right (remember this is the same relay that was causing turn signal problems 2 years ago). Put a new relay in for the engine start and no problems since. This morning it is 28 degrees, engine started and turn signals worked fine.

Aqua Puttana
11-09-2018, 03:06 PM
... I'm pretty sure that if your hazards are working, the problem is with the "multifunction switch" (turn signal stalk. If your hazards don't work, it's more likely to be the turn signal relay or fuse panel.

Sent from my PH-1 using Tapatalk
Good point. :thumbup:

The turn signals and emergency flashers do share the same flasher circuit.

:cheers: vic

Nautamaran
11-09-2018, 03:51 PM
The shell enclosing FB#1 snaps apart, making it easier to access the bendy forks that hold fuses and relays... you REALLY donít want to tip or twist your fuses.

-dave

Kit7873
11-09-2018, 06:52 PM
Checked bulbs, all good, all around. Hazards work though they were erratic 1x in about a 3 minute test (I was driving so I didn't want to continue test).

Kit7873
11-10-2018, 06:37 PM
I have an intermittent problem with my turn signal relay and a loose connection inside the fuse box. I'm pretty sure that if your hazards are working, the problem is with the "multifunction switch" (turn signal stalk. If your hazards don't work, it's more likely to be the turn signal relay or fuse panel.

Sent from my PH-1 using Tapatalk
Hazards just stopped working and the turn signals have also died completely. So your guess is fuse panel? Other electronics seem to be working fine.... I finally have time today to poke around under the steering column.

Bobnoxious
11-10-2018, 06:38 PM
Relay?

mrawsonw
11-10-2018, 10:00 PM
Yeah, I think that if your turn signals and hazards died at the same time it's either the bottom rightmost relay, or it's the fuse panel itself. Mine is the fuse panel, I believe. I can make them work by pressing on the bottom right corner of the panel, near the relays.
-Morgan

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Aqua Puttana
11-11-2018, 01:57 PM
Not that you asked...

... I can make them work by pressing on the bottom right corner of the panel, near the relays.
-Morgan

It sounds like you may be a candidate for a DIY repair like I did.

https://sprinter-source.com/forum/showthread.php?p=374375#post374375

If that doesn't interest you, you should replace the FB#1. It is not very expensive and should correct your problems.

:cheers: vic

Jodean
11-12-2018, 03:33 AM
I have an intermittent problem with my turn signal relay and a loose connection inside the fuse box. I'm pretty sure that if your hazards are working, the problem is with the "multifunction switch" (turn signal stalk. If your hazards don't work, it's more likely to be the turn signal relay or fuse panel.

Sent from my PH-1 using Tapatalk

my hazards worked fine, but blinkers were intermittent, it WAS the flasher relay under the column, bad contacts.

Jodean
11-12-2018, 03:34 AM
Yeah, I think that if your turn signals and hazards died at the same time it's either the bottom rightmost relay, or it's the fuse panel itself. Mine is the fuse panel, I believe. I can make them work by pressing on the bottom right corner of the panel, near the relays.
-Morgan

Sent from my PH-1 using Tapatalk

its actually inside the relay, pushing it in is just making contact inside the relay, while it seems like the fuse block at fault. swap relays first.

theres a good thread in here, pry in database area about it.

Kit7873
02-21-2019, 09:25 PM
Hi everyone, thanks for the feedback. I ordered a new turn signal relay, installed it, and the problem of intermittent blinkers/hazards is solved.

Thank you!

outbound
02-22-2019, 01:12 AM
i'd thot same too, after replacing same relay - esp since it was buzzing when energized - but alas,
the problem returned shortly (pardon pun) later (prob being intermittent turn sig/flasher ops)
but when turn sigs stop, sometimes hitting the flasher button briefly makes the turn sigs work again,
and if they dont, giving the under steering column panel a whack usually gets em going again.
(stuff like this can be quite confusing, but methinks the multifunction switch is the problem)


:2cents:

thatchillaxdude
02-22-2019, 03:19 AM
I had to replace my relay just the other day. It's a new-to-me T1N, so I bought a spare.

mrawsonw
02-22-2019, 01:25 PM
The relays certainly go bad, but the fuse panels also need to be replaced sometimes. I replaced my relay twice, didn't fix it. Previous owner replaced multifunction switch, didn't fix it. I replaced the fuse panel, fixed it!
-Morgan

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