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Topic: Blowing fuses (Read 1700 times) |
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Alan
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I Love My Cosi
 
Posts: 425
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Blowing fuses
« on: May 4th, 2004, 1:09am » |
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Right where do I start?
It all started last thursday when I pulled up and my interior ,light came on, I thaught the door had opend or something but when I went to start the car Nothing.
So checked fuses and fuse 16 had blown 7.5A replaced it all fine untill the next day when I got stuck in a car wash. How embarising  . So put another fuse in to get me going again, I was dertemined to go to the Derby meet.So On the way up the M5 in Birmingham It blew again so armed with fuses put one in, Drove arround Derby No problems OBD2 checks ok (Thanks to Andy).
So traveling back home today I was poping fuses like no tommorow. This is what I have noticed When it blows>:-
No Speedo, Rev Counter, Fuel Gauge or temp Gauge.
No intermitant Wipers
No display on cc pannel or fans dont run
No Electric Windows or Sunroof
And interior light comes on for 20 seconds
If I turn the car off the starter motor wount turn
No Warning lights on the dash either.
So any Ideas.
Also I noticed tonight that if I boot the car to say overtake it blows, select (s) sometimes blows and more recently When I select (d) sometimes it blows.
I have taken the plastic trim from arround the gearstick and checked there but nothing.
Could someone please help as I am running out of fuses.
Alan 
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Fitzy
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Re: Blowing fuses
« Reply #1 on: May 4th, 2004, 1:35am » |
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Hi Alan
If my memory serves me correct was it your car that all the electronic gizmo's in it ie: extra speakers playstation etc. I dont mean to try and teach you to suck eggs but maybe all these gizmo's are putting a too bigger strain on the whole electrical system, mostly the alternator, again if my memory is right with all that extra load maybe you need 1: more powerful alyternator 2: bigger battery with amperage or maybe an extra battery. i come from East London and have seen there and in Essex ie : Southend all the boy racers with there souped up Nova's and Escorts etc with all the usual extra gizmo's, and quite a few of them have had to fit a second altrenator and batteries to cope with all the extra load, have also seen this done on the American Hot Rod programs on Sky TV. They have had to weld new mountings on the engine and or chassis to hang second alternator on, might be worth checking out if your electrical system can handle all this load as it is or you may have to install a second alternator, but this will put a strain on the engine and cause other probs to show up.
Good luck mate keep us informed on how you get on.
Fitzy  
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JohnJ
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98 2.3 Ultima
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Re: Blowing fuses
« Reply #2 on: May 4th, 2004, 8:34am » |
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With all the extra stuff taing more power...how do supply all the gizmos....the fuse for a start would not be high enough and further more if you increase the size of the fuse you could overload loom and cause a fire.....you would need to get a double fused wire fromthe battery +/- and a relay operated from the origonal supply to take some of that load away from the Ignition.
Just a though but temporarily disconnect all them gizmos for now and watch what happens.
JJ 
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Fitzy
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Re: Blowing fuses
« Reply #3 on: May 4th, 2004, 11:54am » |
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Have just looked through some old copies of Max Power and some of the boy racers have had to fit a second alternator and bigger batteries, but one thing i forgot to mention but noticed in the write ups was that they also spent a fortune upgrading the wiring system. In a copy dated march 2000 theresa chap with Sierra Cosworth who spen nearly £22.000 on the gizmo's and wiring upgrades to take the extra power including 30amp/50amp and 60amp fuses in the charging system he also had fitted 2 new computer modules to regulate the charging sysyem and adjust supply or even shut it down in the event of an overload, it maybe worth you looking into this side of things Baz.
Fitzy
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Alan
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I Love My Cosi
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Re: Blowing fuses
« Reply #4 on: May 4th, 2004, 8:06pm » |
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HI there Fitzy
It is me the one with all the extra Gizmos in the car. But they are all run off a seperate battery and are run indipendent of the car wiring. I have introduced a split charging circuit for charging the battary only when the car is running. And all is fused in a seperate fuse box so if a fault did develop with the Gizmos it wount effect the rest of the car.
The problem I am getting is that if I put my foot down or push the sport button the fuse will blow. Which makes me think that the problem is somehow gearbox wiring related, BUT where do you start. I am going to traul through the advice now so wish me luck.
Hope to see you at the next meeting if all goes well.
Cheers
Alan
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colinw
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Re: Blowing fuses
« Reply #5 on: May 4th, 2004, 10:13pm » |
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please mail me off list colin.lewis4@btinternet.com i have been having the same problem for last 2 weeks fuses 16 and 17 blowing i have a pic that may be of intrest
colin
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Fitzy
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Re: Blowing fuses
« Reply #6 on: May 4th, 2004, 10:39pm » |
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Well at least it not all the gizmos, sounds like it could be kick down switch related if it only happens when you put foot down or use sports switch, personally i'd start looking from there onwards and try and trace where the wiring goes, could be chaffed somewhere along it so when it kicks down and send a pulse to switch it earths out somewhere, hopefully the wiring diagrams will help.
Good luck m8
Fitzy
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Alan
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I Love My Cosi
Posts: 425
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Re: Blowing fuses
« Reply #7 on: May 5th, 2004, 12:03am » |
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Hi Again
I think I have found the fault? 
When I go under the car I can hear an electrical arcing noise from in the gearbox. It is at the rear near the pringle switch I think?
So it looks like a autobox specialist job, loads of ££££££ I think.
So off to cry now
Cheers
Alan
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allante
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1996 24v Scorpio Saloon
 
Posts: 289
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Re: Blowing fuses
« Reply #8 on: May 5th, 2004, 6:33am » |
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too many burgers....I did warn you!
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Snoopy
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Re: Blowing fuses
« Reply #9 on: May 5th, 2004, 7:51am » |
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The 2.3 and 24v fitted with the A4LDE box do NOT have a kick down switch as such its all taken from the inputs to the EEC ... The older cars like the 12v have one ....If it is the PRNGL switch then it is possible to replace this yourself.. it tells you how on that disc that you allegedly have... worth a try before going to a FMD or and auto box specilaist......
Cheers
Snoopy
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Alan
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I Love My Cosi
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Re: Blowing fuses
« Reply #10 on: May 5th, 2004, 11:44pm » |
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Hi guys update
Had another look tonight and found that the arking noise from the box is still there after I take the fuse out so I may be barking up the wrong tree. What do you think. I have taken the wiring out from the gear stick end in the car and inspected that including the O/D button on the stick and all is fine, so I have now put that back together. I have Taken part of the dash out and had a look at the wiring behind the cc unit, All is fine, (thanks craig for the info but my fault must lay somewhere else, thanks anyway).
Help I am now running out of Ideas on where to look and what to do. (all is fine with the OBD2 test) But I am still blowing fuses.
Any Ideas Lads
Alan
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Eric_R
Administrator
Cosworth Owner 1998 - 2006 & site co-founder
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Re: Blowing fuses
« Reply #11 on: May 6th, 2004, 12:18am » |
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Alan,
Have you checked the alternator output and load?
If the diodes are faulty it may be overcharging the system.
Similarly you need to check the battery drain when the engine is running - perhaps the alternator is shorting the charge system to earth above a certain rpm.
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Alan
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Re: Blowing fuses
« Reply #12 on: May 6th, 2004, 12:35am » |
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Thanks Eric_R
I have checked the output of the alternator and all is fine. It even blows fuses without the engine running.
I sat in the car last night put the ignition on so all the dash came on, started pressing the sport button and then the economy button and after about 5 times of alternating between them the fuse blew, That is what is making think that the fault lays somewhere between there and the fuse box.
Any other Ideas
Cheers
Alan
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bertie
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another thought...reading the wiring diagram it shows fuses 16 and 17 protecting electronics/PCM....have you checked the PCM for dampness/wiring chaffing...all the signals go through this...worth a try
simon
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Alan
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I Love My Cosi
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Re: Blowing fuses
« Reply #15 on: May 6th, 2004, 9:07pm » |
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Cheers Berty
I will have a check of that tonight.
Will let you know what I find.
Cheers
Alan
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Alan
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I Love My Cosi
Posts: 425
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Re: Blowing fuses
« Reply #16 on: May 9th, 2004, 12:45am » |
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UPDATE
Right after stripping out the dash and checking all the wiring going to all the modules and where the cables go through the bulkhead I Found NOTHING. everything was as good as new. So I put it all back together Also changed some bulbs while the dash was out.
So what I have done now for the time being I have disconnected the green multiplug from under the center console, The one which feeds the O/D (s) (e) (w) switches and all seems fine so far. I have checked all the wiring feeding theise switches and all is good.
Do you think that I could have a switch breaking down under load,??
Will keep you posted if I find anything Else.
Cheers
Alan
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scorpio_man
Administrator
Ford Kuga awd
Posts: 5654
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Re: Blowing fuses
« Reply #17 on: May 9th, 2004, 8:25am » |
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hi alan
maybe the bulb/holder is shorting? or something wrong with the prngl switch? if i remember correctly, each button is about £20+vat each! my winter button didn't work until i'd got it coverted to lpg. centre consule was off when fitting the change over switch for the gas. the fitter must have fixed then.
run it disconnected for a few days to make sure, but you seem to be getting somewhere now.
regards
http://www.fordscorpio.co.uk/autoselector.jpg
http://www.carsoft.ru/avtorepair/sierra_el.html
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Alan
Full Member
I Love My Cosi
Posts: 425
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Re: Blowing fuses
« Reply #18 on: May 9th, 2004, 10:53pm » |
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Cheers Andy
I will run the car for a week or so with the connector disconected, If I dont get a problem then I will take the switches out then and start playing to find out which one is giving me trouble.
BTW Thanks for the links verry usefull
cheers
Alan
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