GU Hazards

Submitted: Monday, Nov 17, 2003 at 22:38
ThreadID: 8589 Views:1604 Replies:5 FollowUps:5
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I've wired the rear tail lights (upper) indicators etc., and now the hazard fuse blows when I switch them on. QUESTION is how do I fix this problem - can I install a relay and where, or can I get lower wattage globes for the indicators and where?
Thanks In Advance
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Reply By: Foss - Monday, Nov 17, 2003 at 22:44

Monday, Nov 17, 2003 at 22:44
The same thing would have happened the first time you hooked up a trailer. 10 amps is right on the limit with the amount of globes being run.

Just use a 15amp fuse, everyone else does.

cheers
AnswerID: 37603

Follow Up By: Member - AndrewPatrol - Monday, Nov 17, 2003 at 22:51

Monday, Nov 17, 2003 at 22:51
I don't wanna cook the wires, must be a reason the 10 amp fuse is in there in the first place. If there was a short why don't the fuse blow for the indicators?
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FollowupID: 27231

Follow Up By: Foss - Monday, Nov 17, 2003 at 23:05

Monday, Nov 17, 2003 at 23:05
It's simple, Blinkers only light up half the compliment of lights at a time. Hazards light them all. 10 amps not enough with two extra 21Watt globes. 21Watts @ 12 Volts = ~ 2amps, give or take a little for loss & inefficiency. But don't take my word for it, work out the current draw for yourself.

cheers again.
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Follow Up By: Member - Cocka - Monday, Nov 17, 2003 at 23:47

Monday, Nov 17, 2003 at 23:47
If the wiring checks OK you'll probably find a larger fuse OK because the intermitent nature of the blinkers would be hard pressed to cook the wiring and their usually only on for short periods. Carpe Diem
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FollowupID: 27236

Reply By: Member - Cocka - Monday, Nov 17, 2003 at 22:45

Monday, Nov 17, 2003 at 22:45
Check all the wiring again - sounds like you got a short somewhere. Start from the front with a test light or mult meter and work to the back or from wherever you cut into the circuit.Carpe Diem
AnswerID: 37605

Reply By: Truckster (Vic) - Monday, Nov 17, 2003 at 22:56

Monday, Nov 17, 2003 at 22:56
As Mick says its common as blowing holes in pistons in early GUs...

Specially when you run a trailer it gets worse.. The common fix on the Patrol list is bigger fuse...

Otherwise, go back to standard.
AnswerID: 37608

Follow Up By: Mick - Tuesday, Nov 18, 2003 at 08:10

Tuesday, Nov 18, 2003 at 08:10
does the bigger fuse come with a 4.2?
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FollowupID: 27253

Reply By: Member - Bradley- Tuesday, Nov 18, 2003 at 09:28

Tuesday, Nov 18, 2003 at 09:28
You can buy a remote relay flasher unit from auto elecs so that you can hook up extra lights and not increase the load and resistance on the original circuit, so your flash speed etc stays the same. Jacks come standard with one in the lh rear panel. shouldn't cost more than about $40 me thinks.. Try narva or hella.Life is short- but there's always time for a yarda.
AnswerID: 37653

Reply By: GUPatrol - Tuesday, Nov 18, 2003 at 09:59

Tuesday, Nov 18, 2003 at 09:59
This is how you calculate it:

Volt x amp=Watts
Watts / volt =amps

Original load one side= 2x 21 watt globes plus 10watt side plus 5 watt dash.
(Add one more 21Watt if you have a bullbar with lights ie: genuine)

21 + 21+ 10+5= 57 watt divided 12 volts= 4.75 amps (one side only) all four (hazzards) is double 9.5 amps. Original fuse is 10 amps
Add another two 21w globes = 3.5 amps. 9.5 amps + 3.5= 13 amps "there is your answer"
a 15 amp fuse needs to be used because you increased the load.

The same thing applies to all electrical devices.
The same thing applies if you enabled the upper tail/stop lights.
Will
AnswerID: 37656

Follow Up By: GUPatrol - Tuesday, Nov 18, 2003 at 10:04

Tuesday, Nov 18, 2003 at 10:04
One more thing.

You will not overload the wiring, the wiring can stand more than that, the next thing that will get overloaded ie: if you hook up a caravan with another bunch of lights, is the flasher unit.
The flasher unit is a self regulated one so it does not increase or decrease speed but it will get hot and cut out (if overloaded)
If a short or an overload was significant enough to burn the wiring the 15amp fuse will blow first.

Will
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FollowupID: 27260

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