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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / February 2007MEGANE GURU SOUGHT - RELAYS STOP WORKING SOMETIMES (MOST TIMES)
I'm trying to fix a friends megane before he has to scrap it. Its a shame because its pretty clean car. Whats happening is that the WIPER relay, the HAZARD LIGHT / INDICATORS relay, the CENTRAL LOCKING relay, a FUEL INJECTION relay and the DRIVERS ELECTRIC WINDOW relay, all decide to stop working intermittently. The car won't start if the problem is present, but if the car is already running when the problem shows up, it will keep running okay, (although as stated none of the relay related functions can be carried out). Not only that, the relays will remain in ther present condition when the fault shows up. In other words, if the wipers are on or the indicators ar on, when the fault appears, even switching these devices off doesn't affect them. They will keep wiping and flashing no matter what I do with the control switches. The problem is that the fault is now present about 99% of the time. This means that I can't even get it started most of the time. I end up switching the hazard lights on, (although they obviously won't actually flash while the fault is present), I then go and sit in the house, looking out the window. Once I see the hazards starting to flash, I know I can quickly run out and get the car started. If I'm not quick, I miss the opportunity and have to wait maybe another 2 or 3 hours. I'm tempted to fit a new Body Control Unit and an Injector Module, but would like to be convinced that that will sort it out. Any advice? Thanks Year and engine size please!! A Renault, Mégane is a POS!! <-- I can say that here, always wanted to tell a customer that! <grin> You're perhaps going to need to find, pull off, clean off and then reinstall all the relays that pertain to each device. If you find that this works...purchase a tube of dialectric grease and perform the same task, this time using dilectric grease on each terminal.  SignatureBing Bang Boom Voila Done! > I'm trying to fix a friends megane before he has to scrap it. Its a > shame because its pretty clean car. [quoted text clipped - 38 lines] > > Any advice? Thanks On 6 Feb, 19:08, "Daryl Bryant" <sealsforensec...@charterseals.net> wrote: > Year and engine size please!! A Renault, Mégane is a POS!! <-- I can say > that here, always wanted to tell a customer that! <grin> You're perhaps [quoted text clipped - 49 lines] > > - Show quoted text - Hello Everybody. I have tried to reply to this thread three times. I haven't been ignoring you. My replies just didn't get through. Don't know why. Here we go again for another try. The car is a 97 Renault Megane 1.4 piece of scrap. (I've already told the owner the same). I looked in the Haynes manual. The diagrams don't show any of the ground wires going to the relays, so its pretty naff too. I spoke to a Renault technician about replacing the relays. Turns out on some models they're soldered into the BCM (Body Control Module). If your Hazard Light / Blinker relay expires you need the new BCM. Not only that, if the BCM is replaced I also need to get an Injection ECU that is married to it, and an ignition key. What a piece of trash. I also assumed that the GROUND or POWER rail tothe BCM was the culprit, but there are a multitude of wires going to it via about a dozen connectors, so its difficult to figure out what is what especially with the intermittent fault in the middle of all that. I told the owner to visit the breakers yard. I'm hoping replacing the BCM wil sort it out. I tried removing the relays from the old one but theres no way they want to come out. They must be the soldered version. The BCM also comprises the fuse box and some sort of diagnostics I believe. Thanks just the same. (I told the owner to buy a good OPEL. Well designed. e.g. Clutch swap in 25 minutes with about 4 spanners. Renault scrap generally wants the engine half out) I wouldn't touch a Renault with a barge pole. Byebye Yep, some are soldered in - not yours tho, because if they were you wouldn't be having this issue!! SignatureBing Bang Boom Voila Done! On 6 Feb, 19:08, "Daryl Bryant" <sealsforensec...@charterseals.net> wrote: > Year and engine size please!! A Renault, Mégane is a POS!! <-- I can say > that here, always wanted to tell a customer that! <grin> You're perhaps [quoted text clipped - 52 lines] > > - Show quoted text - Hello Everybody. I have tried to reply to this thread three times. I haven't been ignoring you. My replies just didn't get through. Don't know why. Here we go again for another try. The car is a 97 Renault Megane 1.4 piece of scrap. (I've already told the owner the same). I looked in the Haynes manual. The diagrams don't show any of the ground wires going to the relays, so its pretty naff too. I spoke to a Renault technician about replacing the relays. Turns out on some models they're soldered into the BCM (Body Control Module). If your Hazard Light / Blinker relay expires you need the new BCM. Not only that, if the BCM is replaced I also need to get an Injection ECU that is married to it, and an ignition key. What a piece of trash. I also assumed that the GROUND or POWER rail tothe BCM was the culprit, but there are a multitude of wires going to it via about a dozen connectors, so its difficult to figure out what is what especially with the intermittent fault in the middle of all that. I told the owner to visit the breakers yard. I'm hoping replacing the BCM wil sort it out. I tried removing the relays from the old one but theres no way they want to come out. They must be the soldered version. The BCM also comprises the fuse box and some sort of diagnostics I believe. Thanks just the same. (I told the owner to buy a good OPEL. Well designed. e.g. Clutch swap in 25 minutes with about 4 spanners. Renault scrap generally wants the engine half out) I wouldn't touch a Renault with a barge pole. Byebye > I'm trying to fix a friends megane before he has to scrap it. Its a > shame because its pretty clean car. [quoted text clipped - 38 lines] > > Any advice? Thanks I have no idea what a Megane is, but the trouble you are describing is typuical of a faulty ground point. If there is a body module common to all of these failing devices, I would check for voltage at the B+ and ground wires feeding the module. B+ is obviously good on the B+ wires, and less than .25 volts on the ground wires while the problem is occuring is normal. High voltage on the ground wires indicates a faulty ground path. It's unlikely that all of these are operated through a "body" module, but perhaps there is a common ground point to all relays involved. The other possibility is that all of these relays are in the same relay box and they all share a common power strip internally which is intermittently flaking out. I would consult a wiring diagram if possible. Toyota MDT in MO Renault Megane car.I looked it up at a search engine. cuhulin > Renault Megane car.I looked it up at a search engine. > cuhulin I emailed him privately about this one. Megane was a good car. Won an award for crash survival, IIRC. I dont think they are available in the USA. Generally Renault and Peugeot are not marketed here. And it is a shame. Good cars now, crappo a couple of decades ago. |
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