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Old 09-25-2012, 01:42 AM   #1
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I installed daylighters and...

Went muddin last night... Well spent 3 hours trying to get my friend out of a mud hole.. And my volts dipped down a lot while sitting around. I made it home pushing 10 volts. Had my daylighters on for about a half hour jeep not running. Figured it would charge up on the way home. Not the case. Alternator tested bad. Has a warranty so replaced it. Still no volts so replaced alt fuse #1. Worked for about 3 minutes never turned daylighters on just head lights. Then volts dipped down far again because fuse blew. Took my truck back to autozone got 3 more fuses, all the 50 amps they have, and discovered there is an alt fuse 1 and 2. And 2 was bad also. Replaced both drove around for 10 minutes with daylighters and headlights on no problems. Would the one fuse being bad put too much load on the other blowing it?

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Old 09-25-2012, 01:05 PM   #2
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Old 09-25-2012, 01:33 PM   #3
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If they are in the same circuit, yes. The current they share and divide up would be sent across the other if the one were to blow. I don't know if they are wired in the same circuit like that though. What size fuse do you have in your Daylighters btw? Also, the distance from the light and the lights relay can affect amperage, it will draw more amps when it is further downstream. You want your relay as close as possible to the light, and you need your lights main circuit fuse as close as possible to the + power source. I'm not saying you did, but I know guys who hook up their electrical aux equipment and think they can put the fuses, relays, and switches wherever they want, and that's not always the case. It takes more voltage to push amperage across a longer wire than it does a shorter wire.

It is very important to make sure you are using the correct size fuses in your aux electrical systems, too big and you'll burn up your equipment, over-wear your alternator, and possibly cause an electrical fire, not enough and you'll blow them left and right. I don't know what size fuses the 1 and 2 alternator slots take, but make sure that they are correct and confirm with the manual that 50's will be ok. Don't expect what you remove from the Jeep to be the correct part for it, Previous Owners could have altered the system at some point and just stuck a bigger fuse in there just because they didn't want to blow them anymore and bypass the real problem, just a suggestion. Do you have a stock alternator or high performance one btw?
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Old 09-25-2012, 11:27 PM   #4
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Stock alternator. The fuse box cover calls for 50s. The KC lights don't have a relay included in the kit, just a 20amp fuse on the power from battery to switch. I always make sure there is as little wire as possible. I have also thought about doing relays for my headlights but have not found a good diagram to go off of nor do I know what relays to use.
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Old 09-26-2012, 05:15 PM   #5
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A 30amp relay is good for a pair of lights. If they are 100 watt bulbs. When the lights draw enough juice, the relay will kick out to prevent melting the wires. Its always a good idea to run aftermarket lights through a relay system, just to be safe, as well as having a professional look to the wiring.

You should never let the Daylighters on without the engine running, that could cause permanent damage to the electrical and charging system.

There already is a relay built into the wiring for the headlights, so there is no need to wire one in for them.

Most relays you can get at an auto parts store has the wiring diagram for them printed either on the packaging or on the relay itself.
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Old 09-26-2012, 05:56 PM   #6
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Quote:
Originally Posted by 0III0forlife View Post
A 30amp relay is good for a pair of lights. If they are 100 watt bulbs. When the lights draw enough juice, the relay will kick out to prevent melting the wires. Its always a good idea to run aftermarket lights through a relay system, just to be safe, as well as having a professional look to the wiring.

You should never let the Daylighters on without the engine running, that could cause permanent damage to the electrical and charging system.

There already is a relay built into the wiring for the headlights, so there is no need to wire one in for them.

Most relays you can get at an auto parts store has the wiring diagram for them printed either on the packaging or on the relay itself.
That's a negative Ghostrider, our Wranglers do not have relays built into the wiring harness for the headlights, and a popular modification is to install relays in line of the headlamps to improve power distribution to the lamps and thus increasing light output. They didn't start adding relays to Wranglers until the 1997 models.

Leaving the lights on for a period of time, while not recommended, won't damage the battery unless the voltage drops below about 9 volts, at which point you risk causing cell failure inside of the battery, which is impossible to recover from.

I recommend buying a relay pack off of Amazon.com or eBay.com, just a Bosh style relay. Don't forget to buy the ones that include the sockets for simplicity. Then proceed to wire them in. You should do the headlights while you're at it, meaning you uneed to pick up some 12-14awg wire for the headlight connections, and if the wiring going to your headlights is bad enough then you'll need to get enough to do that (12 feet should be plenty). Also, don't forget to grab a couple of fuse cradles, and some 20 amp fuses.

Sending the full 13.6-14 volts directly to your headlights and Daylighters will improve light output quite a bit as well as build in some safety for your electrical system.
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Old 09-26-2012, 08:43 PM   #7
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How many relays should I get?

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