Turn signal, hazard lights fix

Post by **98v70GLT** » 02 Mar 2010, 17:18

This is on a V70 GLT 1998, I am not sure what years they used the same type of flasher unit but I wouldn't be surprised if it is many.
I wonder if this complicated electronic unit is part of the alarm system?!

The problem was that the flashers would work for a short time after getting back in the car and than stop blinking. The lights would come on so I used it with a driver operated sequencing as to have an indication of turning anyway for my dear (close) followers. That got old quick and therefor the attempt to fix this, which worked!

Radio Shack will sell you the part for $ 1.19 which beats to have to replace the unit I would say.
4.7µF 50V 20% Axial-Lead Non-Polarized Elect. Capacitor
Model: 272-998 | Catalog #: 272-998

The flasher unit is located behind the hazard light push button. Remove this by removing the radio or the ashtray. Gently push out the unit, for some reason the plastic that hold the clips to hold it in place broke on mine, and I was gentle to begin with. I had to use some wood wedges on one side to tighten it up to have it stay in place. I guess you can't have it all but it works fine.

Taking it appart:
You need to remove the hazard push button from the unit, gently pry behing this button on the short side, you will see what I mean, you need to pry on both short sides to undo the catch that it has.

Than the next step is to remove the housing, again prying gently, the housing is made of quite thin plastic, and slide this off the unit.

Surprise, IC etc. etc. fansy stuff. But you will see three capacitors, two small ones and one larger one.

The 'big' one was the problem in my case. I replaced this with the same values as the old one only the new one is bigger but it did fit. See picture.

Put it all back together. The push button part of the unit slides on to the little switch from top to bottom it does not push onto it! Again you will see as you get it appart.

I don't know if the other two capacitors can give you a problem as well, if the big one didn't fix it you might try to replace the other ones, two different values, 2.2 µF 50V and 3.3 µF 50V if my eye sight was good enough.

Good luck and I hope it works as well for you as it did for me. Let us know if it worked for you or if you had to replace the other capacitors.

Post by **Ozark Lee** » 02 Mar 2010, 17:52

Pinned in the database. I love component level fixes. When doing a radial lead to axial lead fix like this I normally put some small heat shrink on the leads to keep them from inadvertently shorting out to something.

...Lee

Post by **98v70GLT** » 02 Mar 2010, 18:48

Good point, should have but didn't, it seemed OK like this but point well taken.

ashline02 · Post by **ashline02** » 15 May 2010, 15:54

First off, thanks for the great DIY post! It's the only alternative to buying another switch that I've seen. Unfortunately, on my way to Radio Shack to purchase the new capacitor, I realized that it was not at fault for the signal failure. What I did find is that it is one of the three relays that is at fault (the far left one in your pic). When I pressed on it, the hazards started to flash again and then promptly shut off again. So I continued on to Radio Shack just in case and then to my local auto parts store to see if they had any relays on hand. Not finding any, I came back home to see if you might have any advice on where to find one and/or how to go about replacing/repairing it. As for removal, I can see the obvious connections on the top side of the board, but I'm not sure if there are any to the bottom that I need to be wary of.

At this point what I need to know is, is this something that I should just let go of and buy a replacement, or can it be fixed. Any advice is much appreciated!!

Michael
98 V70
91 940SE
92 960
98 S90
02 V70 T5

Post by **BEJinFbk** » 15 May 2010, 20:38

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Digikey
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Mouser Electronics
http://www.mouser.com/?utm_source=googl ... iAodbFj5KA

Allied Electronics
http://www.alliedelec.com/

Newark Electronics
http://www.newark.com/jsp/home/homepage ... 3539030961

All Top Notch Supply Houses!

Post by **PCars** » 27 Mar 2012, 23:12

I used Mouser recently for some transistors. Packaging quality and shipping time were both incredibly good.

thejakeott · Post by **thejakeott** » 01 Jul 2017, 12:27

Sorry to resurrect such an old post...but I had the same symptoms, just a different cause (I believe) on my 99 V70 Base.

I was experiencing the same issue: intermittent turn signal disfunction that would get worse with heat, except when I disassembled the unit all parts appeared to be in great shape (no bulging, no leaking, and no indications that the "magic smoke" escaped from any IC or relay)... one thing I did find was that all of the bottom side and some of the top of the PCB was covered in a very thin oil - I noticed that bracket the button was connected to and the housing itself must have been lubricated...I'm thinking it melted down onto the circuit causing a short. I took some isopropyl alcohol to both sides of the circuit with a brush, and wiped a bunch of the excess off the switch bracket and housing - boom! Turn signals appear to function uninterrupted! However, the hazard button's action isn't quite as smooth and floaty as it was before...

<edited to add the year and model>

Drivevolvos · Post by **Drivevolvos** » 26 Jan 2025, 16:23

Thank you for posting this subject.
I was able to complete a repair by replacing the three relays (RLY1, RLY2, RLY3)
RLY1 was worn out which caused the lights not to flash but stay on. The hazard lights would not come on.
So, I replaced all three relays.
Original Part Numbers: Original, AJJM331.
Replacement Part Number: JJM1A-12V (relay automotive SPST 20A 12V)