Author Topic: Brake lights Alfetta GTV  (Read 905 times)

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poohbah

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Brake lights Alfetta GTV
« on: July 13, 2018, 11:17:11 PM »
I have a minor but annoying problem - tail lights, rear indicators, and reversing lights all work on my GTV, but the brake lights have stopped working on the LHS. I replaced bothLHS brake light globes (dual filament 12V 21/5W) but although the tail light filament comes on with the rest of the lights, the brake light filaments still don't work.

Any hints where to start? Are there separate fuses for brake lights on each side?

Not sure if it is relevant, but I also discovered some lovely rust holes either side of the cut-outs in the sheet metal when I removed the lens. I guess moisture could have got in and corroded the connections? Seems odd that it would be both globes though, given they each have their own plastic connector terminal that are a few inches apart.

Now:    1999 156 V6
             1981 GTV
Before: 2001 156 V6 (sadly cremated)

sportiva

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Re: Brake lights Alfetta GTV
« Reply #1 on: July 14, 2018, 09:02:21 AM »
Hi poobah
As you know one of the light has two connectors use a circuit tester at both connectors to confirm if power is reaching there then onto the single connector on the other light.  If you have power then remove the printed circuit board and clean up the contacts also clean or even reposition the tangs inside the bulb retainer sometimes lifting them up a little will bring a dead light back to life

cheers
3.0 GTV6 156JTS X2

75 2.5
2.0 Alfetta Sportiva #22
1.8 Alfetta
1.2 alfasud
2 75 parted out
15 alfettas parted
10 gtv parted
5 alfasuds parted

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poohbah

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Re: Brake lights Alfetta GTV
« Reply #2 on: July 14, 2018, 11:08:51 AM »
Thanks sportiva, will see if I can get them going again.  Don't want to sound dumb, but when you say circuit board, do you mean at fuse box?
« Last Edit: July 14, 2018, 11:11:50 AM by poohbah »
Now:    1999 156 V6
             1981 GTV
Before: 2001 156 V6 (sadly cremated)

CitroŽnbender

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Re: Brake lights Alfetta GTV
« Reply #3 on: July 14, 2018, 06:22:59 PM »
I'd presume he's referring to the bulb carrier, that portion the lamp bases lock into with their bayonet fixings. If you've got corrosion it's obviously a bit humid in there, so quite possible oxidisation has occurred. I use grey Scotchbrite instead of 0000 steel wool to buff contacts.

There are contact enhancing chemicals, dear to buy but in a marginal situation might make enough difference to be worthwhile. Look up Stabilant-22A. 

Multimeters are getting cheaper by the year, I augmented my 2006 $79 unit with a $40 meter from the same supplier (Jaycar) in May. Near enough to the same specs.

poohbah

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Re: Brake lights Alfetta GTV
« Reply #4 on: July 14, 2018, 08:05:04 PM »
Cheers CB, my first plan of attack is to check the connections to the bulb carrier. Definitely my main suspect given the rust holes I found lurking once I removed the lens.

I suspect its nothing too complicated - even the tail light filament on one one flicked on/off with a bit of fiddling the globe, so contact points may just need a clean up.
Now:    1999 156 V6
             1981 GTV
Before: 2001 156 V6 (sadly cremated)

bteoh

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Re: Brake lights Alfetta GTV
« Reply #5 on: July 17, 2018, 02:29:56 PM »
Hi,
It is quite common for the bulb carrier contacts to corrode and bulbs to cease getting power. It happened to mine too and I had to clean them they went back to normal.

poohbah

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Re: Brake lights Alfetta GTV
« Reply #6 on: July 17, 2018, 02:47:32 PM »
Cheers BT, I hope to get to it on weekend.
Now:    1999 156 V6
             1981 GTV
Before: 2001 156 V6 (sadly cremated)

GTVeloce

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Re: Brake lights Alfetta GTV
« Reply #7 on: July 25, 2018, 03:38:25 PM »
I have always had to clean up the contacts on the rear boards to ensure reliable lights. Once done I have never had to do it again. Plus its an easy job to do. I usually just use some fine wet and dry sand paper and finish it with a little contact cleaner. Also spray a little cleaner into the plug and check the wires in the plug and firm and sound.

If that doesn't work, out with the multimeter and work backwards from the plug. There is another plug that can be the culprit and to save you hunting for it, it is hidden underneath the dash hard up against the passenger side. From memory it is a red plug with about eight wires on it.

Having said that, I think from memory the feed to the brake lights is a single wire that loops from one side to the other which should confirm the poor contact theory.

While you are there, clean the earth contact between the two light clusters.

poohbah

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Re: Brake lights Alfetta GTV
« Reply #8 on: July 25, 2018, 06:56:13 PM »
Thanks. Plan to get to it this weekend.
Now:    1999 156 V6
             1981 GTV
Before: 2001 156 V6 (sadly cremated)

poohbah

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Re: Brake lights Alfetta GTV -fixed
« Reply #9 on: July 27, 2018, 06:40:13 PM »
Thanks all - all it took was a little bit of cleaning the contacts to get all lights working again.
Now:    1999 156 V6
             1981 GTV
Before: 2001 156 V6 (sadly cremated)

Floppa

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Re: Brake lights Alfetta GTV
« Reply #10 on: September 08, 2018, 08:25:47 AM »
Hi guys, on the subject of taillights does anybody know where to find new lens? My 85' gtv is ready to rego when I can find one. I've searched the world over and come up short

Regards jon

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Paul Gulliver

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Re: Brake lights Alfetta GTV
« Reply #11 on: September 08, 2018, 06:08:19 PM »
I don't know about new ones but Hugh Harrison @ Monza Motors in Bayswater should have some
Paul Gulliver
Present
2013 Black Giulietta  QV
1979 Silver Alfa 116 GTV Twin Spark
1973 Red Alfa 105 2.0 GTV

Past
2006 Black 159 2.2 J
1970 Dutch Blue Series 2 1750
1975 Blue Alfetta Sedan 1.8
1981 Piper Yellow Alfetta GTV 2000
1985 Red Alfetta GTV 2.0
1989 White Alfa 164
2000 Red Alfa 156 Selespee

CitroŽnbender

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Re: Brake lights Alfetta GTV
« Reply #12 on: September 08, 2018, 07:00:10 PM »
Iíve just seen the German breakersí prices - yeow! But there is one new RH lens for Ä179 including mwst.

Alfetta77

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Re: Brake lights Alfetta GTV
« Reply #13 on: September 08, 2018, 07:11:37 PM »
Hi, Jon, late GTV lenses are listed on Highwood Alfa website with price as "please ask" http://www.highwoodalfa.com/77ff1d6c-0455-43bf-91d1-b8d657392653-9.html, which may mean they are NLA, but can't hurt to send an email just in case. Second the Monza Motors suggestion too.
Current:  Alfetta GTV 1977 Silver
Previous: Alfetta GTV 1980 Red

Floppa

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Re: Brake lights Alfetta GTV
« Reply #14 on: September 12, 2018, 09:50:14 PM »
Hi, Jon, late GTV lenses are listed on Highwood Alfa website with price as "please ask" http://www.highwoodalfa.com/77ff1d6c-0455-43bf-91d1-b8d657392653-9.html, which may mean they are NLA, but can't hurt to send an email just in case. Second the Monza Motors suggestion too.
Thanks Paul & alfetta 77, will give monza a call tomorrow. I have tried Chris at Highwood and like you said NLA. Italian job has a new one but it's killer expensive, might be my only option if monza has none.

Regards Jon

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