69shelbycoupe 11 Report post Posted September 12, 2013 I went to napa to get some headlights and they only have halogen replacements. Can these go in with factory wiring or does something need to be done to make them work? Quote Share this post Link to post Share on other sites
dennyb68 11 Report post Posted September 13, 2013 I've been running halogen for a few years and have no issues with the factory wiring. Quote Share this post Link to post Share on other sites
Midlife 834 Report post Posted September 13, 2013 Some people have had problems with Halogens and headlight switches, as they pull more current than normal incandescent bulbs. That causes the headlight switch internal circuit breaker to activate. From what I've heard, those cars with separate high beam lamps seem to accept the Halogens better than combined headlamps. Quote Share this post Link to post Share on other sites
69shelbycoupe 11 Report post Posted September 13, 2013 Some people have had problems with Halogens and headlight switches, as they pull more current than normal incandescent bulbs. That causes the headlight switch internal circuit breaker to activate. From what I've heard, those cars with separate high beam lamps seem to accept the Halogens better than combined headlamps. That is what I've heard a lot about but then again it may not as dennyb68 said. I guess I will try it and see. If it blows out I'll change it out. Quote Share this post Link to post Share on other sites
j69302 11 Report post Posted September 13, 2013 How many watts are they? Quote Share this post Link to post Share on other sites
miketyler 15 Report post Posted September 13, 2013 I had never heard that but as such only a potential problem for 70 models? I have them on my car but havent spent much time with brights on continuous. I guess relays would be a quick remedy. Quote Share this post Link to post Share on other sites
MustangChuck 16 Report post Posted September 13, 2013 This link describes how to add relays for headlights in a 66. Should be similar for the 69/70. Chuck Quote Share this post Link to post Share on other sites
69shelbycoupe 11 Report post Posted September 13, 2013 This looks like the way to go! http://www.ebay.com/itm/CERAMIC-H4-HEADLIGHT-RELAY-WIRING-HARNESS-HEADLAMP-LIGHT-BULB-SOCKET-PLUGS-5-3-4-/330974040111?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A1969|Model%3AMustang&hash=item4d0f97102f&vxp=mtr Quote Share this post Link to post Share on other sites
hawkdriver 14 Report post Posted September 13, 2013 Shelby, Thats exactly what i bought after much research, this will undoubtedly provide much more power to whatever light you use even OEM lights or at least save your existing wiring and switch from the power draw. Unfortunately i cannot give you a review as mine is still in box and im in Afghanistan. I am very interested in the lights you have chosen however, this is the one pice to this upgrade i am not complete with. I have seen alot in excess of 100$ for the set on ebay, but am not thrilled with the bulbs nor the price, You have any recommendations on lights. I will be home in just over an month and this is the first thing i am upgrade so if i beat you to it ill let you know how the harness works out. Quote Share this post Link to post Share on other sites
69shelbycoupe 11 Report post Posted September 14, 2013 Shelby, Thats exactly what i bought after much research, this will undoubtedly provide much more power to whatever light you use even OEM lights or at least save your existing wiring and switch from the power draw. Unfortunately i cannot give you a review as mine is still in box and im in Afghanistan. I am very interested in the lights you have chosen however, this is the one pice to this upgrade i am not complete with. I have seen alot in excess of 100$ for the set on ebay, but am not thrilled with the bulbs nor the price, You have any recommendations on lights. I will be home in just over an month and this is the first thing i am upgrade so if i beat you to it ill let you know how the harness works out. I just bought sealed halogens. Two low and two high. I bought all four for $38. I was just unsure about the wiring. I may get that harness soon and give it a try Quote Share this post Link to post Share on other sites
j69302 11 Report post Posted September 14, 2013 what is the wattage of the new halogens you bought. Quote Share this post Link to post Share on other sites
shaun071 62 Report post Posted September 17, 2013 I've recently fitted halogen lights to my 69 coupe and the improvement is amazing. The plug for the inner high beam lights will have to be cut off and the power wire fitted to the bulb and the earth wire fitted to the earth point on the headlight body. Make sure you connect these two wires the right way as you will trip the headlight switches breaker if they are back to front. I'm running relays, one for high beam and one for low beam. Bulbs are 60/55 watt for outer lights and 55watt for inners. Quote Share this post Link to post Share on other sites
therebel 10 Report post Posted September 17, 2013 Do your self a favor and power the headlights off a relay. Your old wiring will thank you and it is much safer. You can buy the relays, wire, and terminals from NAPA for under $25. Also, if you want some really bright high beams, run a Wagner 4049 bulb. They are a tight fit but its the same sealed beam used in KC day lighters and they really light up the road. Quote Share this post Link to post Share on other sites
69shelbycoupe 11 Report post Posted September 17, 2013 I am not sure the wattage. I just went to buy new headlights from napa and they said they don't have the incadesent or whatever bulbs anymore. So he gave me the direct replacement for that and they are halogens. It doesn't say on the box. I am in the process of getting all my lighting working. I am in the middle of a build as you can see the link in my sig. So actually I'm having a problem now as I don't have 12v power to the headlights and I put all new fuses under the dash. So I am trying to figure out where to start next. I hate trouble shooting wiring issues. At the connector it shows 3v Quote Share this post Link to post Share on other sites