300 sleeper cab headlight wiring diagram

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a3sully
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300 sleeper cab headlight wiring diagram

Post by a3sully » 16 Dec 2011 02:27 am

looking for 300 sleeper cab headlight wiring diagram. Also some advice trying to figure out why no lo beam but rest of lights work properly. No power to headlights in lo beam. When using test light on one of the wires to headlight switch, panel lights go dim and test light doesn't light. Has battery voltage using dmm. Has one white wire and 9 black wires going to it and 10 black and 1 white wire going to combination switch. Trying to figure out what each wire is for, where it goes, what voltage I should see and when I should see voltage at headlight switch connector and combination switch connector, and what, if anything else I am missing to check in that circuit

Evoman
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Re: 300 sleeper cab headlight wiring diagram

Post by Evoman » 16 Dec 2011 03:05 am

This isnt lorries :?
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Speedy88
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Re: 300 sleeper cab headlight wiring diagram

Post by Speedy88 » 16 Dec 2011 04:00 am

Aye, Volvo 340 as in the car, not the truck. Sorry dude :) (Although doesn't one of the old schoolers on here drive a 340 truck... Farrell?)
'88 340 Williams (Sold)
'85 360 GLS - Drift project (Sold)
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volvosneverdie
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Re: 300 sleeper cab headlight wiring diagram

Post by volvosneverdie » 16 Dec 2011 05:25 pm

Evoman wrote:This isnt lorries :?
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volvodspec
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Re: 300 sleeper cab headlight wiring diagram

Post by volvodspec » 16 Dec 2011 07:40 pm

both are switched by a relay that is on the middle of the tunnel, in a RHD truck to the left side of the cabin next to the glovebox panel, you need to remove a few dashboard panels to get there.

pettaw
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Re: 300 sleeper cab headlight wiring diagram

Post by pettaw » 18 Dec 2011 11:57 am

Relays are under the steering column in RHD cars, can be a PITA to find which one is not working though, but it might well be just dirty connections to the fusebox right underneath at the firewall.

macplaxton
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Re: 300 sleeper cab headlight wiring diagram

Post by macplaxton » 18 Dec 2011 02:25 pm

pettaw wrote:in RHD cars
Ah come on now Pettaw, have you read the thread? We're talking lorries here!!
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82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

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bogbasic
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Re: 300 sleeper cab headlight wiring diagram

Post by bogbasic » 21 Dec 2011 05:09 pm

Epic! So now I know why lorries keep coming up when I search on the fleabay, along with all the damned Ferrari's. Anyhow, I hope the lorry is better now.
1988 340 1.4 GL, 218k, 5 door (Grey Bess). Gone to CBA.
1991 340 1.7 GL, 64k, 5 door, petrol blue (Deep Blue).
1988 360 2.0 GLE, 140k, 5 door, ocean blue metallic (Blue Bess).
1989 340 1.7 GL, 108k, 3 door (Red Ness).
More info here!

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volvodspec
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Re: 300 sleeper cab headlight wiring diagram

Post by volvodspec » 28 Feb 2012 05:19 pm

but does the removed relay function properly? it could well be that the relay sticks or is burned stuck due to the foglights having a higher Wattage then standard

macplaxton
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Re: 300 sleeper cab headlight wiring diagram

Post by macplaxton » 28 Feb 2012 06:25 pm

It's okay Anjo, tireboy is really Mr Spambot! :lol:
72 DAF 44 Estate 78 Volvo 343DL Black BeautyImageImage
82 Volvo 343DL CVTImageImage 88 Volvo 340DL Diesel

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volvodspec
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Re: 300 sleeper cab headlight wiring diagram

Post by volvodspec » 28 Feb 2012 07:27 pm

hahaha i already was like WTF reading it but since all F-series (except FH) trucks combine the normal beam and foglights via the same relay instead of lighting ECU (for simplifying country-specific lighting rules) the spam-comment read as a true story to me :lol:

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