help with KCs
#1
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heres the switch im gonna go get at summit later
PICO WIRING 5536PT - Pico Toggle Switches – SummitRacing.com
and i already have a switch in the cup holder so im tryin to think of another place that would look good and not be too hard to mount...
#9
Do you have an ashtray or cubby hole next to your airbag switch?
My first switch was mounted on that all ugly like. I've since added 5 switches to the front of my shorty console. I do believe we've got a big 'where'd you mount your switches' thread in the interior section..might wanna check it out.
My first switch was mounted on that all ugly like. I've since added 5 switches to the front of my shorty console. I do believe we've got a big 'where'd you mount your switches' thread in the interior section..might wanna check it out.
#10
Do you have an ashtray or cubby hole next to your airbag switch?
My first switch was mounted on that all ugly like. I've since added 5 switches to the front of my shorty console. I do believe we've got a big 'where'd you mount your switches' thread in the interior section..might wanna check it out.
My first switch was mounted on that all ugly like. I've since added 5 switches to the front of my shorty console. I do believe we've got a big 'where'd you mount your switches' thread in the interior section..might wanna check it out.
#11
I dont have any pics of mine but they are on the lower part of the dash (peice below the steering wheel) to the right and left of steering wheel.
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I just read this thread, and was about to comment that 14 ga. wire is definitely TOO SMALL for the current needed by those lights!! ...I see that you've found that out during testing. good -- better now, then when your truck is on fire!
You may use 14 ga. wire (or even 16, but I wouldn't go smaller than that) for the wire that goes to the switch from the relay. For the wiring that goes from the battery to the relay, and from the relay to the lights, I wouldn't use anything smaller than 12 ga. or maybe even 10 ga., depending on the wattage of the lights.
If it's just two KCs, at 150W each, that'd be 300W total on the circuit; meaning it'd be drawing somewhere in the neighborhood of 21 to 25A (definitely too much current for 14 ga. wire!)... if the KCs have the smaller 100W bulbs in them, then the total current draw for two of them would be 14 to 18A total.... so, if you can use 10 ga. wiring on that side of the circuit, you'd be okay with either size KC lamp, provided you put no more than two on that circuit.
If you want to wire up more than 2 KC lights: you'll need to repeat this circuit (separate wiring, separate relay[s]) so that you're not trying to switch more than 25A or so through the relay. You can run them all from the same switch, by connecting the trigger point on the relays together... thus, flipping one switch will trigger (for instance) three relays, and each of those relays would feed voltage to two lights. Please let me know if you need/want a diagram, and I can draw one up when I get home from work.
The relay can be, in either case, a standard 30A or 40A relay. The control wiring (that triggers the relay from the switch) draws very little current, so 16 ga. wire is fine for that.
Don't forget to put a FUSE in the circuit!! ...at a minimum, you'll want a nice 30A fuse on the + lead going from the battery to the relay.
You may use 14 ga. wire (or even 16, but I wouldn't go smaller than that) for the wire that goes to the switch from the relay. For the wiring that goes from the battery to the relay, and from the relay to the lights, I wouldn't use anything smaller than 12 ga. or maybe even 10 ga., depending on the wattage of the lights.
If it's just two KCs, at 150W each, that'd be 300W total on the circuit; meaning it'd be drawing somewhere in the neighborhood of 21 to 25A (definitely too much current for 14 ga. wire!)... if the KCs have the smaller 100W bulbs in them, then the total current draw for two of them would be 14 to 18A total.... so, if you can use 10 ga. wiring on that side of the circuit, you'd be okay with either size KC lamp, provided you put no more than two on that circuit.
If you want to wire up more than 2 KC lights: you'll need to repeat this circuit (separate wiring, separate relay[s]) so that you're not trying to switch more than 25A or so through the relay. You can run them all from the same switch, by connecting the trigger point on the relays together... thus, flipping one switch will trigger (for instance) three relays, and each of those relays would feed voltage to two lights. Please let me know if you need/want a diagram, and I can draw one up when I get home from work.
The relay can be, in either case, a standard 30A or 40A relay. The control wiring (that triggers the relay from the switch) draws very little current, so 16 ga. wire is fine for that.
Don't forget to put a FUSE in the circuit!! ...at a minimum, you'll want a nice 30A fuse on the + lead going from the battery to the relay.
#18
thanks for the info. im about to go pick up some 10 ga. i have one fuse on the power wire. do i need another?
i was just fixing a bad connection and saw a bit of smoke and grabbed the wire IT WAS HOT, if it wasnt for checking the bad connection my dad did last night my truck would probably have caught on fire......
i was just fixing a bad connection and saw a bit of smoke and grabbed the wire IT WAS HOT, if it wasnt for checking the bad connection my dad did last night my truck would probably have caught on fire......
#19
Matt --
One 30A fuse, on the main wire from the battery to the relay is the minimum. Sometimes folks will put a second 30A fuse on the wire from the relay to the lights (this protects the relay in the event of a short in the wire leading to the lights).
On the switch side, where the current draw is only a couple hundred milliamps or so, a 2.5A fuse on the + wire going from the relay to the switch is fine. Since this "hot" wire will be going through your firewall and into the cab, it's probably a good idea to put a fuse on there as well.
One 30A fuse, on the main wire from the battery to the relay is the minimum. Sometimes folks will put a second 30A fuse on the wire from the relay to the lights (this protects the relay in the event of a short in the wire leading to the lights).
On the switch side, where the current draw is only a couple hundred milliamps or so, a 2.5A fuse on the + wire going from the relay to the switch is fine. Since this "hot" wire will be going through your firewall and into the cab, it's probably a good idea to put a fuse on there as well.
#22
Brian.....if 14ga is too small to power two 130w KC's, then why does KC send a 16ga harness to wire the lights up with???
I've always used 14ga on my lighting with 30a relays, fuse between the lamps and the relay, fuse between the relay and the power. Never had any problems.
I know you know your ****, I'm questioning KC.
I've always used 14ga on my lighting with 30a relays, fuse between the lamps and the relay, fuse between the relay and the power. Never had any problems.
I know you know your ****, I'm questioning KC.
#23
#25
ok so the other day i wired up 5 kc wannabees (100 watt) and i used 3 relays. 2 relays run 2 lights and 1 relay runs 1 light....just cause 5 is not even. so i ran 16ga from the batt to a 50amp circuit breaker. and from that to the first relay, and from the first relay to the second and second to 3rd. so 1 wire runs to the first relay hooked on by a solder less connector and i have another wire coming out of that connector going to the next relay....so there is 2 wires coming out of the connector on the first relay and the second and 1 on the 3rd relay. so basically 1 16ga wire is running 3 relays running 5 100 watt lights....then i ran 1 18ga wire from the switch to the relays again branching out to the 3 relays. and i have 20ga grounds on each relay. then from the relays to the lights i used 3 16ga wires and than at the end 2 of them branched out so it went to 5 lights.....now flame me how bad is this...i didnt think it was till i saw this guy talking about 14ga not being big enough.