fuse box strip down and repair

biketeacherdave · Jan 20, 2015

So bit of back ground on faults first. When I got the RR the blowers didn't exactly blow just a little breeze bit of research led me to relay 7 in the fuse box it did have a badly burnt pin and the fuse holder was a little melted. New relays problem solved but new I would have to tackle the main cause, fuse box.

Just recently intermittent blowers and my book symbol was coming up on the hevac but everything was working bit strange.

So today was the day took the fuse box out of the car you can see the burnt holder under relay 7

Stripped it completely best way I decided to do this was to cut the links between the PCBs it just needs to much heat to get all that solder off without damaging lifting the copper print. Just resolderd the cut pins on assemble make sure you use small cutters to cut these links if you do this method.

You can see the fried holder and again print side burnt out, while I had it apart I looked for and found another dozen or so dry joints all cleaned and solderd up.

Put it all back together refitted and tested well I never everything works and my book symbol on the hevac has gone been out for an hours drive all ok

Littelwill · Jan 20, 2015

Well done you!! your a brave man!

biketeacherdave · Jan 20, 2015

Littelwill said:
Well done you!! your a brave man!

nah it was easy iv a back ground in electronic repairs started life fixing sony walkmans, laser disc players for those old enuf to remember them video 2000 machine tv videos blah blah blah until i gave it all up some 15 years ago.

even if you think you dont have a problem in that fuse box you do its badly made poor pcb very thin found a lot of bad joints on the maxi fuses and other relays.

mine wasnt as bad as some iv seen during research on the net

mozz smith · Jan 20, 2015

hi , well done sir !!!!!! :clap2::clap2::clap2::clap2::clap2::clap2:

shame you don't live in Manchester , ive had problem on my v8 thor for last 10 months finally resolved !!!!

twas yellow relay at bottom row ignition ,,, so keeping fingers crossed now all good at present !!

was thinking about complete new fuse box but cost prohibitive may try refurb on mine or buy another 2nd hand and refurb that 1st and see how it goes ,,, do you have a " how to script " from start to finish , need fine detail and step by step guide as my mincepies not good ,,, cheers and once again well done , regards mozz

biketeacherdave · Jan 20, 2015

mozz smith said:
hi , well done sir !!!!!! :clap2::clap2::clap2::clap2::clap2::clap2:

shame you don't live in Manchester , ive had problem on my v8 thor for last 10 months finally resolved !!!! twas yellow relay at bottom row ignition ,,, so keeping fingers crossed now all good at present !! was thinking about complete new fuse box but cost prohibitive may try refurb on mine or buy another 2nd hand and refurb that 1st and see how it goes ,,, do you have a " how to script " from start to finish , need fine detail and step by step guide as my mincepies not good ,,, cheers and once again well done , regards mozz

i will do a step by step how to guide but its back in the car now and i didnt take to many pics, how about you get a s/h one post it to me il refurb it and send it back good as new

plumbfisher · Jan 20, 2015

Littelwill said:
Well done you!! your a brave man!

+1 Excellent! :clap2:
Did you have to re-synch fobs after? or re-set windows etc as per battery removal?

biketeacherdave · Jan 20, 2015

plumbfisher said:
+1 Excellent! :clap2:
Did you have to re-synch fobs after? or re-set windows etc as per battery removal?

yeah normal stuff for battery dissconnect mine syncs by unlocking/locking while holding down remote button just been out again still all ok no book symbol on the hevac all working ok left it on auto and the blowers go on and off as needed to maintain correct heat.

just a full front diff overhaul and head lining to do and i think im done, think my steering wheel shudder i experienced recently was power steering related iv got a wet power steering hose.

biketeacherdave · Jan 20, 2015

i http://rangeroverworld.blogspot.co.uk/2010/02/fuse-box-relays.htm

l looked up a few how to guides i found this one the best my fuse box was in much better condition than this one. i approached it a bit differently tho i cut the circuit board connector pins and just resolderd them back together i also didnt carry out the mod either , this guy took 5 hours doing it think i did mine in 2 including removing and refitting the fuse box

mozz smith · Jan 20, 2015

biketeacherdave said:
i will do a step by step how to guide but its back in the car now and i didnt take to many pics, how about you get a s/h one post it to me il refurb it and send it back good as new

wow , that's an offer I can't refuse if you don't mind, I will p.m. you if that's ok , many thanks dave .

biketeacherdave · Jan 20, 2015

pm sent

biketeacherdave · Jan 21, 2015

so the book symbol returns

but this time iv got a flashing snow flake to go with it looks like the external air temp sensor mite be playing up will have a look see tomorrow bit odd tho everything works i can make it all go off again sometimes by switching on and then on again.

blowers are still working as is the heat and blowing where ever i want it to

Grrrrrr · Jan 22, 2015

External air temperature was certainly snowflake round here this morning!

biketeacherdave · Jan 22, 2015

yep have carried out tests today and eliminated the external air temp sensor think its a sticky blend motor on passenger side causing the book symbol bit odd tho seeing as it went out after fixing the fuse box

tomcat59alan · Jan 23, 2015

biketeacherdave said:
yep have carried out tests today and eliminated the external air temp sensor think its a sticky blend motor on passenger side causing the book symbol bit odd tho seeing as it went out after fixing the fuse box

Fuse box on its way out again?

biketeacherdave · Jan 24, 2015

tomcat59alan said:
Fuse box on its way out again?

haha no mate the fuse box isnt causing the book symbol after all the fuse box is now in tip top health. iv tested the external air temp sensor thats all good.

when i did my valley gasket i moved the a/c compressor out the way mite have something todo with that. up to then intermittent book symbol off more than on. think having the battery dissconnected for a while reset everything. who knows its a range rover.

PPP38vouge · Jan 24, 2015

Hi Dave,
When I purchased my RR I also had the check book symbol popping up occasionally so got a friend of mine to pop over with his nanocom and when he plugged it in it showed that the sensor on the coolant pipe behind the dash was reading incorrectly, may be your problem too. They are a doodle to change and cost around £20 from island.
Hope this helps. Paul.

biketeacherdave · Jan 24, 2015

PPP38vouge said:
Hi Dave,
When I purchased my RR I also had the check book symbol popping up occasionally so got a friend of mine to pop over with his nanocom and when he plugged it in it showed that the sensor on the coolant pipe behind the dash was reading incorrectly, may be your problem too. They are a doodle to change and cost around £20 from island.
Hope this helps. Paul.

yes thats a good call as in sure im not getting correct heating in the cabin will get one orderd up asap

Grrrrrr · Jan 24, 2015

Have you got any diagnostics to read the HEVAC fault? There must be someone in London with a Nanocom or similar!

biketeacherdave · Jan 24, 2015

Grrrrrr said:
Have you got any diagnostics to read the HEVAC fault? There must be someone in London with a Nanocom or similar!

no dont have any diag but intend on buying one soonish so far have managed to fix n mend without but i know as a p38 owner i need to keep something in the glove box for those oh shhhhhhhhhhhhht moments

biketeacherdave · Jan 27, 2015

fixed its self again book symbol went off when i popped out for petrol bloody typical as the internal heater pipe temp sensor arrived today.

fuse box strip down and repair

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