diggerman Posted July 17, 2010 Share Posted July 17, 2010 The 15 amp fuse for my wipers (150 Sigma SV) blows quite often. At the PBC at Caterham Mids they suggested that it was due to friction but having cleaned the screen etc and driven quite a few miles in the rain without a problem, I'm sure the problem lies elsewhere. The fuse seems to blow the instant I switch the switch (matbe one in ten times) and I wonder if the switch is faulty. Any ideas? Peter C Link to comment Share on other sites More sharing options...
tbird Posted July 18, 2010 Share Posted July 18, 2010 Doesn't the fact that the problem hasn't happened since you cleaned the screen suggest CC were correct about friction, other than that sounds like damaged wire somewhere, I guess you could run a temp feed and see if fault disappears CSR 200 Aztec and Black Link to comment Share on other sites More sharing options...
phil 01 Posted July 18, 2010 Share Posted July 18, 2010 I don't know whether this is possible or even if the the fuse type is available but maybe replace the fuse and replace with a motor rated fuse type which designed to get over the intial inertia .We use these types of fuses all the in the electrical trade, and one company you ca try is the fuse company if they cant get you one they dont exist.Just a thought has the linkage been damaged or anything snagging the linkage http://www.thefusecompany.com/ regards phil Link to comment Share on other sites More sharing options...
diggerman Posted July 18, 2010 Author Share Posted July 18, 2010 I misled you slightly cos it does still happen but by no means everytime. I do get the impression that not giving the switch a firm push makes the difference. Its a bit like the other question a few items down from this one about hazard switches. perhaps the switches are c.r.a.p.? Peter C Link to comment Share on other sites More sharing options...
jeffi Posted July 18, 2010 Share Posted July 18, 2010 Peter C - funny enough, the very first time I switched my wipers on and used the washer jets the fuse blew! Seems OK now but I suspect the initial current drain presented by a struggling motor and/or combined with washer jets is greater than the fuse rating. I'm keeping a few spares handy for a rainy day! Link to comment Share on other sites More sharing options...
phil 01 Posted July 18, 2010 Share Posted July 18, 2010 The very purpose of motor rated fusing is to get over any sticky rotational problems a motor could have without blowing so this would work even if you have a poor quality switch,also the contacts within the switch could be carbonised which would add resistance to the circuit, I think your assessment of crap switches is a firm possibility but not backed by the response you have had,good luck and post your cure when you find it. Regards Phil Link to comment Share on other sites More sharing options...
PAUL MARRIOTT Posted July 18, 2010 Share Posted July 18, 2010 FRICTION ❗ ❗ Wallys Certainly not by wipers on the screen, maybe the drive cable is binding but if it blows as soon as you put it on i'd look for a short somewhere, cable damage causing shorts to earth or a dodgy switch. If you've a meter check the current draw on start up and in operation to try and see what is happening. You shouldn't need a motor rated fuse for this Link to comment Share on other sites More sharing options...
diggerman Posted July 18, 2010 Author Share Posted July 18, 2010 Thanks all. Peter c Link to comment Share on other sites More sharing options...
Gavin H Posted July 19, 2010 Share Posted July 19, 2010 Are you sure there isn't another circuit spliced into the wiper circuit? I was having to replace the fuse even more regularly - it turned out the intercom had been put on that circuit and the extra load was causing it to blow. Since removing the intercom from that circuit it has not blown at all... Just a thought! Link to comment Share on other sites More sharing options...
adz Posted July 19, 2010 Share Posted July 19, 2010 Hi, I have exactly the same problem, new build roadsport 125, and I suspect the wiper switch. If I switch it slowly, the fuse blows, if I jab quickly at the switch it's OK. As a work around untill I can be bothered to look at the switch I got a resettable fuse- its got a little tit which pops out when it blows so I can just reach under the dash and reset it, got it from RS components ~£7 adam Link to comment Share on other sites More sharing options...
jeffi Posted July 19, 2010 Share Posted July 19, 2010 I like the sound of the RS circuit breaker in the same format as an auto fuse. Maplin also do ones which reset themselves, but only up to 10A. Link to comment Share on other sites More sharing options...
elie boone Posted July 19, 2010 Share Posted July 19, 2010 I think CM referred to the friction in the wheelbox of the wipers Link to comment Share on other sites More sharing options...
diggerman Posted July 20, 2010 Author Share Posted July 20, 2010 Thanks again everyone for your suggestions. i will certainly get a resettable fuse until I have time to sort the problem. Peter C Link to comment Share on other sites More sharing options...
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