I just hooked up my fog lights and ran the hot lead into the inside of the Fiero compartment... what would be a good fuse to use on the fuse box to work the fog lights the fog light system came with a (on /off switch /with an on led lamp 3 pins)...... pin3 of the switch goes to gnd there are no metal parts so I hooked the gnd wire to one of the screws that hold the fuse box in between the washer and the screw head will this work ? pin#2 hot lead that goes to the 2 fog lights up front pin #3 hot lead has its own fuse goes to the Battery or fuse box.
Thanks I am so so sorry to hear about the loss of a fellow Brother

Type of lamp?
Halogen types need run wire to battery and a relay.
See my Cave, Fog/Driving lights

LED eats allot less power. Can likely just wire into LB HL w/o relay.

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quote Originally posted by theogre: Type of lamp? Halogen types need run wire to battery and a relay. See my Cave, Fog/Driving lights LED eats allot less power. Can likely just wire into LB HL w/o relay.

yes it is leds not halogen what fuse is the LB HL ? Thanks

low beam headlights

HL have breaker inside HL switch.

Does have a relay or not?
yes... likely plug main into extra "port" in fuse box. https://www.fiero.nl/forum/F.../HTML/095327.html#p3
no... spice to Low Beam same as page link above.

Add a fuse between spice/port and LED because any Fog/Driving light can have problems. Blow at fuse w/o relay stops breaker to "flash" HL.
I believe some/all Ports have no fuse. Even if they do, can keep other things alive when fogs shorts out.
You need total amp used by fog light then fuse = 150% of amp used.
Example: If 18w (total 36w) fog "lamps" draws 3a at 14v then fuse = 5a. (You round up to next full integer.)

quote Originally posted by Blacktree: low beam headlights

This is what Ive always done too.

I personally prefer to use the parking light circuit to activate a relay which powers the fog lights. But that's because I like being able to use fog lights without turning on the headlights. Using the low-beam headlight circuit to activate the relay will work just as well.

But in either case, I'd suggest using battery power via a relay, rather than using an existing lighting circuit to power the fog lights... even if they're LEDs. You might get away with that, with LED lights. But I still wouldn't suggest it.

[This message has been edited by Blacktree (edited 04-08-2015).]

quote Originally posted by Blacktree: I personally prefer to use the parking light circuit to activate a relay which powers the fog lights. But that's because I like being able to use fog lights without turning on the headlights. Using the low-beam headlight circuit to activate the relay will work just as well. But in either case, I'd suggest using battery power via a relay, rather than using an existing lighting circuit to power the fog lights... even if they're LEDs. You might get away with that, with LED lights. But I still wouldn't suggest it.

Doing this allows parking light and fog w/o low beam or w/ High beam on. Driving like this is illegal in many places.
LB HL circuit only activates fog/driving lights w/ LB is on.

While you can run a relay.... LED 18w (each) draws ~3a total @ 14v. (voltage w/ engine running) Is nothing to Many circuits including HL. You need to know your watts for whatever LED is used.

The small fuse stop HL breaker to trip and auto reset when LED or switch/wire to them have a short. The splice and fuse should be close to HL dimmer switch.

Bigger issue is many use 55w LB and 80w HB or more... ignore legal issue in many states that can cause electrical problems. Even just old switches and plug contacts can heat up with legal HL like H6054 55w/65w SilverStar. Is why Headlights page covers adding relays to HL circuit. Two relays need to be close to HL bulbs to eliminate HL load for switches, C100, etc. And new Fuse/breaker/link near the battery, same as Fuse Link B.

[This message has been edited by theogre (edited 04-08-2015).]

quote Originally posted by theogre: Driving like this is illegal in many places.

I hadn't considered that. I'm used to Florida's regulations regarding fog and driving lights, which are pretty lenient.

[This message has been edited by Blacktree (edited 04-08-2015).]