I am talking about earlier 1960s and 70s vehicles with original flasher units, such as this which as you can see has the wattage written on it. They often had 21x2 as in two 21watt 12volt indicator bulbs or an extra +( 21x2) if hazard lights fitted. If wrong or blown bulbs it affected flashing rate. At the time the law here was for MOT tests flashes between 60 and 120 per minute.
The 42 Watt would indicate it is only a flasher unit as in 2 x 21 watt bulbs and not a hazard also, unless it gives a extra bit of information saying that, however usually that would just mean it would work but at the wrong flash rate.
Thanks for the info, Mike. So where is the hazard switch and why would those lights work, but not the turn signals? You think if I just replace the hazard switch that will do it? Is that the actual switch on the dashboard? Part # by chance? Is there not a switch/relay/something for the turn signals? Thanks again for your help!The 42 Watt would indicate it is only a flasher unit as in 2 x 21 watt bulbs and not a hazard also, unless it gives a extra bit of information saying that, however usually that would just mean it would work but at the wrong flash rate.
A common issue on hazard lights is the switch it's self goes faulty and has trouble changing from one job to the other.
Sometimes spraying the inside of it with electrical spray and working it vigorously several times can get it to work, but if not then a replacement part would be needed.
If suspect switch it should be possible to test using a multimeter.
Normally the switch on the dashboard is the only thing apart from the flasher unit you mentioned so no extra relays etc.
