I just inherited a 2001 Ford F150 Lariat from my Father. The left turn signal indicator is not working (most of the time) and they both go out when it rains. When I was driving it home and put on a turn signal I heard a noise similar to an electrical short. As soon as the weather is dry the turn signals work fine. we just had a short down pour and they are not working again. Any help would be fantastic.

 

I would start by checking the pigtail connected to the multi function switch, those wires have a tendency of coming loose, also if im not mistaken on these the gem module gets when because of a leak in your windshield, check that out too. a quick search should turn up more results. also im sure one of the more knowledgeable guys will show up and guide you in the right direction

 

Only make on thread please.