Thanks Soupstone. Yes I saw an earlier post, possibly also from you, that mentioned those fuses. In my vehicle they were taped (fairly loosely) to the side of the bulkhead in the jack storage compartment. I think that they were probably added there when the towing kit was fitted. I'll add in a photo once I have worked out how to upload them here! In my case there are two fuses a 15A fuse in slot 21 and a 7.5A one in slot 19. As far as I can tell they are both good. It would be good to understand what they do so that I can confirm that the associated wiring is all good too. I have swapped the fuse for new ones and made sure the contacts were clean etc but it has not changed anything with the flashers. I am tempted to try to retro-fit an old fashioned separate flasher relay unit as was used on the earlier Voyagers but to do that I need to be able to identify the connections on the fusebox/IPM so if anyone could point me in the direction of a connection diagram for that, I'd be grateful.