Citroen AX 87 dimmed L headlight

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Citroen AX 87 dimmed L headlight

Post by jsp »

So I just recently welded my AX 10E 1987 and after this I put my headlights back and one headlight is dimmed the other will burn?

Is there no relay between it?

Anyone knows this?
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Re: Citroen AX 87 dimmed L headlight

Post by xantia_v6 »

This is almost certainly a disconnected earth wire, or a corroded earthing point for the headlight.
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Now:
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1987 AX 10E Pino
1994 AX 1.4 5dr TGS GTI
1994 AX 1.0 3dr Escapade
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1996 AX 1.1 5dr Verte
2003 peugeot 206 xs leather with auto A/C
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Re: Citroen AX 87 dimmed L headlight

Post by jsp »

Should I pull an extra wire earth then to the headlights?

I was rethinking redoing the whole light system.

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Re: Citroen AX 87 dimmed L headlight

Post by xantia_v6 »

You could just try running a new ground wire to the affected headlamp as a temporary repair.

Your wiring diagram is a bit confusing and as drawn, probably would not work.

Note the pin numbering on Bosch relays:

Image

It is probably just as good to fit a single pair of relays that feed both headlights, doubling up on the relays won't improve performance if suitable gauge wiring is used.
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Re: Citroen AX 87 dimmed L headlight

Post by white exec »

Agree with that. Only two relays needed: one for main beam, one for dipped.
This takes the electrical strain off the lighting/dip switch, and can keep cable runs from battery (fuse) to headlights short.
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Posts: 327
Joined: 04 Dec 2014, 02:05
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My Cars: AX 3x 10E 1.4 GTI 5drs 1.0i
CX 2x GTI turbo
ID 19 1960

Now:
1960 ID 19
1984 CX GTI Turbo 1
1987 CX GTI Turbo 2
1987 AX 10E Pino
1994 AX 1.4 5dr TGS GTI
1994 AX 1.0 3dr Escapade
1996 AX 1.1 3dr spot Burgundy
1996 AX 1.1 5dr Verte
2003 peugeot 206 xs leather with auto A/C
x 12

Re: Citroen AX 87 dimmed L headlight

Post by jsp »

ok what is the pinout of a H4 lamp?

are the R2 and H4 pinout the same?
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previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S
x 1752

Re: Citroen AX 87 dimmed L headlight

Post by white exec »

H4 bulb connections.JPG
Chris
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Posts: 327
Joined: 04 Dec 2014, 02:05
Location: Netherlands
My Cars: AX 3x 10E 1.4 GTI 5drs 1.0i
CX 2x GTI turbo
ID 19 1960

Now:
1960 ID 19
1984 CX GTI Turbo 1
1987 CX GTI Turbo 2
1987 AX 10E Pino
1994 AX 1.4 5dr TGS GTI
1994 AX 1.0 3dr Escapade
1996 AX 1.1 3dr spot Burgundy
1996 AX 1.1 5dr Verte
2003 peugeot 206 xs leather with auto A/C
x 12

Re: Citroen AX 87 dimmed L headlight

Post by jsp »

Thank you for your reply,

Are these the earthing?

Image

Headlights :
Image
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jsp
Posts: 327
Joined: 04 Dec 2014, 02:05
Location: Netherlands
My Cars: AX 3x 10E 1.4 GTI 5drs 1.0i
CX 2x GTI turbo
ID 19 1960

Now:
1960 ID 19
1984 CX GTI Turbo 1
1987 CX GTI Turbo 2
1987 AX 10E Pino
1994 AX 1.4 5dr TGS GTI
1994 AX 1.0 3dr Escapade
1996 AX 1.1 3dr spot Burgundy
1996 AX 1.1 5dr Verte
2003 peugeot 206 xs leather with auto A/C
x 12

Re: Citroen AX 87 dimmed L headlight

Post by jsp »

ok just got sorted, broken dipped beam wire. Will rewire all with relays.
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white exec
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1992 BX19D Millesime hatch LHD
previously 1989 BX19RD, 1998 ZX 1.9D auto, 2001 Xantia 1.8i auto
and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S
x 1752

Re: Citroen AX 87 dimmed L headlight

Post by white exec »

A missing earth/ground connection on an H4 puts both filaments in series, and finding a path back through the other headlight, so the faulty one appears exceptionally dim!

Missing earths on rear light clusters produce all sorts of fun, including indicator and tail-light bulbs dimming and glowing every time the brakes or indicators are used. Car manufacturers still seem to struggle with bodywork grounding. Hardly rocket-science, but it does involve Beans.
Chris
User avatar
jsp
Posts: 327
Joined: 04 Dec 2014, 02:05
Location: Netherlands
My Cars: AX 3x 10E 1.4 GTI 5drs 1.0i
CX 2x GTI turbo
ID 19 1960

Now:
1960 ID 19
1984 CX GTI Turbo 1
1987 CX GTI Turbo 2
1987 AX 10E Pino
1994 AX 1.4 5dr TGS GTI
1994 AX 1.0 3dr Escapade
1996 AX 1.1 3dr spot Burgundy
1996 AX 1.1 5dr Verte
2003 peugeot 206 xs leather with auto A/C
x 12

Re: Citroen AX 87 dimmed L headlight

Post by jsp »

white exec wrote: 16 May 2020, 08:28 A missing earth/ground connection on an H4 puts both filaments in series, and finding a path back through the other headlight, so the faulty one appears exceptionally dim!

Missing earths on rear light clusters produce all sorts of fun, including indicator and tail-light bulbs dimming and glowing every time the brakes or indicators are used. Car manufacturers still seem to struggle with bodywork grounding. Hardly rocket-science, but it does involve Beans.
Thanks Exec, seems only German/French car struggle to do an extra earth on the rear lights.

Got it fixed now, will rewire all with relays.
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