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Post by biffofo on Aug 7, 2014 10:43:53 GMT
hello all
got tomorrow off so
FOGGY
Just trying to sort out previous owners wiring/knitting pattern in P5B bay
If i understand things correctly fog lights do not work if main or dipped headlights are on .
Surely this is unusual as they come on with dipped beam on most cars.
Easy to change to doing this or leave alone ?
FANS
electric fan is off a relay A
relay is triggered by relay B which is triggered by either manual switch under dashboard
or temp sensor in radiator hose
i am confused why B has to trigger A , surely i can just use A.
FUSE & RELAY Arrangement
Toying with idea of changing to combined spade fuse and relay mounting box to replace the glass ones.
Anyone done this ? Does it spoil the looks of the car ?
I did this on my old MG ( it only had two glass fuses so splitting into 8 spades for indivdual items was beneficial)
thanks for all the help guys
biffo
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Post by p5bdownunder on Aug 7, 2014 14:39:16 GMT
I can only answer one of the F's you have requested, that being the Fog Lamps.
It is correct for them to work only with the headlights turned off as the whole idea of having them was because they sit lower to the ground and therefore eliminate glare when driving in fog. If the normal head lights are on then there would really be no use for the fog lamps as they would be ineffective against the glare.
Good luck with your other F's.....!!
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Post by norvin on Aug 7, 2014 16:17:34 GMT
 This is the relay for my electric fan and hazard lights, you should just need one relay I use a switch to turn it on and off, myself I would not change the fuse box. you have posted this in the wrong section. |
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Post by biffofo on Aug 7, 2014 20:07:44 GMT
sorry why is this the wrong section , its electrical isnt it please enlighten me biffo  |
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Post by johnwp5bcoupe on Aug 7, 2014 20:45:11 GMT
sorry why is this the wrong section , its electrical isnt it please enlighten me biffo You posted in the P5 section so it was moved to the correct P5b section  |
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Post by Phil Nottingham on Aug 7, 2014 21:56:21 GMT
Note for the record that 3 Litres (P5's) do not have built in fog lights although most of the wiring is in the loom for the optional single or twin bumper mounted long range spots or fog lights (both the same or one of each) |
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Post by enigmas on Aug 8, 2014 2:37:06 GMT
Biffofo,
Fans: The relays are used to separate the 2 circuits. The manual override probably switches in the ground/earth to the fan motor as the thermo switch should also do. You could simply run a ground feed to the output side of the thermo switch from your manual override switch...but you need to ensure that the manual switch can cope with the load to the electric fan motor (hence the use of the second relay) Ever wonder why your head light switch started to smoke (get hot) when you upgraded the headlights to higher wattage units.
Fog lights: I'd wire them through a separate circuit so that they only come on with the parking lights.
Fuse Box. It's you car (Anything's better than a fire) (Been there, done that)
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Post by Warwick on Aug 8, 2014 3:29:17 GMT
It is correct for them to work only with the headlights turned off as the whole idea of having them was because they sit lower to the ground and therefore eliminate glare when driving in fog. If the normal head lights are on then there would really be no use for the fog lamps as they would be ineffective against the glare. Now there's a radical concept! Perhaps you could explain it to the designers of modern cars, and some of the drivers. |
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Post by johnwp5bcoupe on Aug 8, 2014 6:58:51 GMT
It is correct for them to work only with the headlights turned off as the whole idea of having them was because they sit lower to the ground and therefore eliminate glare when driving in fog. If the normal head lights are on then there would really be no use for the fog lamps as they would be ineffective against the glare. Now there's a radical concept! Perhaps you could explain it to the designers of modern cars, and some of the drivers. Unless things have changed Fog Lights by law can only be used on Dip Beam in the UK  |
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Post by norvin on Aug 8, 2014 9:31:47 GMT
The owner's manual that came with my car says under fog lamp switch that the switch will only turn the fog lights on if the side light switch is on and the headlamp switch is off, I had a Vauxhall Carlton years ago and I am sure that I could turn on the fog or driving lamps with the headlights turned off.
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Post by Phil Nottingham on Aug 8, 2014 13:12:19 GMT
They are not low mounted fog lights so can be used on there own with sidelights
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Post by norvin on Aug 8, 2014 14:37:43 GMT
This is not what John is saying in his post and if they are not fog lights then what are they, Rover call them fog lamps, and John is saying they should be used with dip beam by law.
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Post by David on Aug 8, 2014 14:49:08 GMT
I think you will find the laws have changed since Rover 'wired' the P5B. www.gov.uk/driving-adverse-weather-conditions-226-to-237/overview-226Overview (226) You MUST use headlights when visibility is seriously reduced, generally when you cannot see for more than 100 metres (328 feet). You may also use front or rear fog lights but you MUST switch them off when visibility improves (see Rule 236). Law RVLR regs 25 & 27 I can drive with dipped and fog on my car, though they automatically switch off when I select main beam - but it is 27 years younger than my old Rover. |
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Post by johnwp5bcoupe on Aug 8, 2014 15:18:32 GMT
Now there's a radical concept! Perhaps you could explain it to the designers of modern cars, and some of the drivers. Unless things have changed Fog Lights by law can only be used on Dip Beam in the UK I have read up on the rules today clear as mud!!! I have always considered the "small lights" as Fogs not Driving Lights so if you are in "fog" with sidelights only and Fog lights are you breaking the law as it states dipped beam/headlights must be used in poor visibility! Peter may be able to assist with this one  |
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Post by norvin on Aug 8, 2014 15:41:55 GMT
Like John I have been looking up the law and as John said it's all as clear as mud with the fog lamps, what did surprise me on one site which claimed driving lamps could only be used when main beam was on and go off when dipped beam is on.
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Post by Phil Nottingham on Aug 8, 2014 16:23:16 GMT
Headlights are those pair mounted above 24" so the P5B satisfies this criteria as a permanent dip beam as long as they do not dazzle other drivers. Few MOT inspectors or traffic police know or have the inclination of the law detail which as you say is as clear as mud. The police cannot even enforce using a hand-held mobile whilst driving - only this week I eventually got past a lane hogger weaving all over the place when I noticed he had a tablet PC perched on the steering as he swerved over to the exit slip at speed. I was so surprised I did not take his car number but it would have probably been a waste of time anyway.
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Post by Phil Nottingham on Aug 9, 2014 8:18:40 GMT
Brian - I have your membership number and emailed you yesterday afternoon so in case you have not noticed your Forum Inbox I still need a private email address as Pdf attaches cannot be done through this facility. What year is it eg Column or Instruments Console panel ignition switch. Let me have this and I will send you the diagrams, specify line coded or colour coded (if you are not colour blind!)
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Post by Warwick on Aug 11, 2014 0:00:56 GMT
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Post by Phil Nottingham on Aug 13, 2014 19:28:22 GMT
Bif did you receive the wiring diagrams I emailed you?
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