KentMan Posted May 10, 2020 Share Posted May 10, 2020 Hi I have a 2001 fiat ducato swift Sundance motorhome. I have an issue with my hazard switch where it doesn't flash inside the cab but does flash the external lights. The switch is round and has a multi pin connection. I brought a new one thinking it was faulty but the new one does the same. There is an led in the unit but it's not flashing. I've check the fuse but it's ok. I've looked for a relay but can't find it. Can anyone help please. Link to comment Share on other sites More sharing options...
EJB Posted May 11, 2020 Share Posted May 11, 2020 Presumably a bad earth or severed wire somewhere......time to get wire tracing and try and find it? Good Luck. ;-) Link to comment Share on other sites More sharing options...
KentMan Posted May 11, 2020 Author Share Posted May 11, 2020 Thanks for your response.?? Link to comment Share on other sites More sharing options...
thebishbus Posted May 12, 2020 Share Posted May 12, 2020 The Peter Russek Pocket Mechanic Manual, on page 194 shows things that could effect it . Unfortunately my scanner and computer are not talking to each other at the moment so I can't send you a photo, perhaps someone on the forum can. V2300 Hazard warning light unit. ( 9 connections ) V2305 Flasher unit. (3 connection ) Brian B. ps I cannot see a relay on the wiring diagram for it. It connects to to the fuse box at F1. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted May 12, 2020 Share Posted May 12, 2020 I think this advert shows the switch used on Fred's motorhome https://coastalmotorhomes.co.uk/fiat-ducato-peugeot-boxer-citroen-relay-hazard-warning-light-switch-230.html The motorhome's hazard warning lights do flash when the switch is pressed, so EJB's diagnosis may well be correct that a simple bad earth or broken wire is preventing the switch's LED from illuminated. (It might be worth Fred contacting Coastal Motorhomes for advice.) Link to comment Share on other sites More sharing options...
thebishbus Posted May 12, 2020 Share Posted May 12, 2020 I should have said it also connects to F 17 in the fuse box. Brian B. Link to comment Share on other sites More sharing options...
rayc Posted May 12, 2020 Share Posted May 12, 2020 I do not know if this is any help but it is typical of the flasher / hazard circuit that Citreon / Fiat used at that time. The hazard switch is item 65, the lamp NEG is on Pin 7 and is connected directly to chassis together with the individual dash lamps NEG. I would check that connection first and if ok then look at the inputs to the switch that connect when the switch is operated. I think the POS to the hazard lamp is on the switch Pin 4 and is connected to the indicator relay i.e it gets a POS from the relay when the indicator lamps go ON. Sorry it would not let me add a photo of the schematic to my post Link to comment Share on other sites More sharing options...
rayc Posted May 12, 2020 Share Posted May 12, 2020 Sorry It will not allow me to add the png picture to the post. I get: Request object error 'ASP 0104 : 80004005' Operation not Allowed /forums/includes/include-upload.asp, line 51 Link to comment Share on other sites More sharing options...
thebishbus Posted May 13, 2020 Share Posted May 13, 2020 Me again. Still cannot send you a wiring diagram, but as it is just the lamp not working this may help. The power in for it from F1 connects to pin 9 & 2 on the hazard unit . The ground return is pin 8. F17 connects to pin 3. Brian B. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted May 13, 2020 Share Posted May 13, 2020 rayc - 2020-05-12 2:16 PM Sorry It will not allow me to add the png picture to the post. I get: Request object error 'ASP 0104 : 80004005' Operation not Allowed /forums/includes/include-upload.asp, line 51 That error message indicates that the size of the file you are attempting to attach is well over the 100KB maximum. .png files will attach OK but they need to be no larger than 100KB (This forum's software is 15 years old and written when storage was expensive. My Moderator privileges allow me to attach a file with a maximum 200KB size, but that still means I often need to reduce the size of a file to permit me to attach it.) Link to comment Share on other sites More sharing options...
KentMan Posted May 21, 2020 Author Share Posted May 21, 2020 Thank you all for your help. I'm following all your advice and hope to solve it soon. Sorry for the late response as haven't been on for a few days. Link to comment Share on other sites More sharing options...
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