80 series lights, upgrade, wiring harness and fuse load
Submitted: Saturday, Jun 21, 2008 at 18:24
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macbushy
Hoping someone can help me out with some hints, suggestions and answers.
Looking at various options for upgrade of '95 Multivalve 80 series lights, due to fact that low beam might as
well be a dolphin torch.
Users may know, high beam + super oscars, down to low beam... "oohhhh hope nothing in front of me bigger than a rabbit...."
Looked at HID replacement. mmmmmmm not yet convinced.
Looked at globe up grade + (poss) wiring harness upgrade.
100/130 H4 globes will give me 100w on low beam.
Each side fused to 15 amp each.
But If I have 100/130w for low beam outer,(cause thats where the problem always is), thats drawing 10.8 amps (on high beam - 130w), leaving only 4.2 max for high beam inner = 50w.
Any one see a problem with running a relay for the H/beam headlights? Am I correct in thinking that the headlights relay is set up different to a normal spotlight setup?
Does an after market wiring harness upgrade include any increase in amp loading available? How would the headlight relay handle the extra load ( i think they are 40A). I suspect I may be pushing things to the limit here? Dont wanna see a meltdown, cause I know where it will happen, in the middle of the night, in the middle of nowhere....
I am at least 2 hrs from nearest auto elec.
Even thinking heat may be an issue in the small headlights.
Any one done anything similar?
Reply By: Member - Olcoolone (S.A) - Sunday, Jun 22, 2008 at 19:40
Sunday, Jun 22, 2008 at 19:40
I was thinking about newer Toyotas not the 80 series.
Newer Toyota's don't run relays for there lights.
The positive wire to the left and right lights are switched through a relay.
The relay controls power to the head lights.
You need two 30 amp relays, two 30amp fuses, two good high current fuse holders and one 5 amp fuse and fuse holder + wiring and terminals (40amp relays would be better but not needed).
1) Turn the head lights onto high beam and find the single wire in each head light plug (two per side) on each side of the vehicle that has positive power to it (remember the colours).
2) Find the headlight relay and get access to the bottom of it.
3) With the headlights turned on there is positive power to three of the four pins of the relay.
4) The pin that is not positive is negative switching wire from the headlight on switch inside the vehicle (probably small wire size).
5) Turn head lights off and remove the two factory 15 amp headlight fuses, disconnect the positive wire on the battery.
6) Cut the four wires ( one from each headlight plug as remembered from paragraph 1) and leave enough length to join/solder other wires on.
7) Cut the small wire in the factory headlight relay plug (paragraph 4) and join to pin 86 of both new relays.
8) Run one 6mm wires from the battery via a 30amp fuses you have bought and connect to pin 30 of one of the new relays.
9) Run another 6mm wires from the battery via the other 30amp fuses you have bought and connect to pin 30 of the other second new relays.
10) Join one wire from pin 30 on one of the new relays via a 5amp fuse and link it to pin 85 on both of the new relays.
11) Run one 6mm wire from pin 87 on one of the new relays and connect it to the two wires that have been cut at the left hand headlight plugs.
12) Run another 6mm wire from pin 87 of the second new relay and connect it to the two wires that have been cut at the right hand headlight plugs.
13) Reconnect the battery and your done.
If you don't feel confident enough don't do it as you need some electrical experience.
If you need help just ask or I can send you a wiring diagram.
The total current draw on each side would be 23amps giving a total of 46amps at 12 volts.
Place all wires in convoluted split tubing and cable tie secure, keep the convoluted split tubing away from other looms, radiators and break lines as it will rub through them.
Regards Richard
AnswerID:
311678
Follow Up By: Member - Olcoolone (S.A) - Sunday, Jun 22, 2008 at 19:46
Sunday, Jun 22, 2008 at 19:46
I will add something....
1) Turn the head lights onto high beam and find the single wire in each head light plug (two per side) on each side of the vehicle that has positive power to it (remember the colours).
If using a
test light you may get a weak glow on one of the other wires as
well in the plug.
Turn the head lights to low bean and the glow should go out and appear on one of the other wires.
You are looking for the wire that is the brightest and is on with low and high beam.
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