02-26-2004, 07:56 PM
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#16
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Rando, thanks for all this information. Please keep us updated on what you find out about this!
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2005 4Runner Limited 4X4 V8 since 6/15/05 Titanium Silver with Grey Leather
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02-26-2004, 08:07 PM
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#17
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Maybe someone with the DRLs (but without auto/on headlights) can test this for the rest of us. Just short pins 16 and 12 on the dimmer harness with the headlight switch in the off position. This is exactly what the AUTO position on the dimmer switch does. Then cover up the sensor and see if your lights come on (this could take a few moments). If nothing happens, then there is some programming missing or disabled in the body ECU (unlikely).
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02-26-2004, 08:18 PM
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#18
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BTW, I believe this is the correct sensor.
And this is the correct dimmer switch (for 2004 or 03 w/ foglights).
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02-26-2004, 10:44 PM
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#19
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Electrical Plugs
Just thought I`d mention this.
Most car manufactures put all the plugs in there vehicles during assembly regardless of what options there is eg. foglights, power windows, daytime running lights. Companies do this to reduce the cost of manufacturing by having one wiring harness instead of a wack of different ones. So if you want something like foglights you just need to buy the switches, relays and lights, and then plug them in. VOILA!
Living in Canada we have DRL as a Federal law on all new vehicles built from 1990 on. Vehicles Imported from the US need DRL`s if built after 1989 and its usaully a matter of plugging in a cheap module.
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02-27-2004, 01:33 AM
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#20
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I agree and that appears to be the case with the 4runner. The only caveat is that some parts require there own harness.
Example:
1) The wiring for the autodimming mirror isn't in the truck because that harness is used exclusively for the mirror. Leaving it out doesn't require Toyota to make a different harness. They just omit it completely.
2) Wiring for the light sensor isn't in the truck. Instead there is a junction block (fancy name for a connector) where the solar sensor and light sensor connect. For non Limited and non DRL models, only a 2 wire harness connecting the solar sensor to the j/b is in the truck.
And for what it's worth, the assumption is not strictly true. I've seen cars that DO have different harnesses based on trim levels. In those cases perhaps the harnesses had uses in other platforms that justified their existence in the manufacturers parts bin.
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02-27-2004, 07:21 AM
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#21
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Quote:
Originally posted by rando
I agree and that appears to be the case with the 4runner. The only caveat is that some parts require there own harness.
Example:
1) The wiring for the autodimming mirror isn't in the truck because that harness is used exclusively for the mirror. Leaving it out doesn't require Toyota to make a different harness. They just omit it completely.
2) Wiring for the light sensor isn't in the truck. Instead there is a junction block (fancy name for a connector) where the solar sensor and light sensor connect. For non Limited and non DRL models, only a 2 wire harness connecting the solar sensor to the j/b is in the truck.
And for what it's worth, the assumption is not strictly true. I've seen cars that DO have different harnesses based on trim levels. In those cases perhaps the harnesses had uses in other platforms that justified their existence in the manufacturers parts bin.
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It's not uncommon to have different harnesses for different trim levels as some options are not available in certain levels so they can save money on manufacturing costs. Within the same level it all the harnesses should be the same as it's easier for the assembly line worker to grab an SR5 harness rather than a Limited but it would be alot harder for him to find the harness that has fog lights, but not the sunroof or the JBL but does have the nav system...
As for the autodimming mirror. It only comes standard on Limited models so all the wiring may be built in, but on the SR5 and Sport you need to splice in under the dash (there is no connector or junction block for it to connec to). Makes me wonder what a factory ordered SR5/Sport autodim harness looks like... or if they are all just port installed using the splicing method.
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02-27-2004, 08:02 AM
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#22
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Re: Electrical Plugs
Quote:
Originally posted by aj884runner
Just thought I`d mention this.
Most car manufactures put all the plugs in there vehicles during assembly regardless of what options there is eg. foglights, power windows, daytime running lights. Companies do this to reduce the cost of manufacturing by having one wiring harness instead of a wack of different ones. So if you want something like foglights you just need to buy the switches, relays and lights, and then plug them in. VOILA!
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If only life were so easy and everything were so logical.....
The service manager at my dealership was telling me recently that someone ripped out the instrument cluster on a 2002 model 4Runner on the lot. He said the thief cut the wires.....turns out there are 27 (no kidding!!) different possible wiring harnesses to connect that instrument cluster to the truck. So, they were trying to figure out how to pick the right wiring harness without ordering them all.
Some things may be prewired, others may not. Mine, for example, does not have fog lights and they are not prewired. Reason -- cost of the wiring harnesses is $600 each. Yes, it would be cheaper for Toyota to get the harness, but they have to determine whether it is less expensive to have multiple harnesses or to make all the vehicles the same. If they prewired everything, then word would get out, more people would buy the lower trim (read: lower profit) models and then buy aftermarket parts to "upgrade" to higher trim models.
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02-27-2004, 10:24 AM
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#23
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Re: Re: Electrical Plugs
Quote:
Originally posted by jharris2
If only life were so easy and everything were so logical.....
The service manager at my dealership was telling me recently that someone ripped out the instrument cluster on a 2002 model 4Runner on the lot. He said the thief cut the wires.....turns out there are 27 (no kidding!!) different possible wiring harnesses to connect that instrument cluster to the truck. So, they were trying to figure out how to pick the right wiring harness without ordering them all.
Some things may be prewired, others may not. Mine, for example, does not have fog lights and they are not prewired. Reason -- cost of the wiring harnesses is $600 each. Yes, it would be cheaper for Toyota to get the harness, but they have to determine whether it is less expensive to have multiple harnesses or to make all the vehicles the same. If they prewired everything, then word would get out, more people would buy the lower trim (read: lower profit) models and then buy aftermarket parts to "upgrade" to higher trim models.
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The cost for you is $600, Toyota probably pays about $6. The physical fog light harness may not exist on the truck but there is probably a connector somewhere on the main harness where it plugs into. We can't get accessory and the main harnesses confused. I'm sure there are alot of cluster harnesses for a vehicle, depending what guages they have, warning lights, std or auto etc... but they probably all have a common connector where they tie into the main harness. I know lots of people who own Dodge trucks that added fog lights buy plugging in the harness, relay and installing a switch (dash wiring for switch was there, underhood wiring needed to be installed). It's nothing new to people that things might be prewired... why do you think buying the accessories after the fact are so expensive?
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02-27-2004, 12:21 PM
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#24
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OK, so I think we are saying the same thing or nearly the same thing. In the end, I believe it comes down to economics. I don't presume to know how Toyota's assembly lines are configured nor all of the factors that go into their decision to make one or many harnesses.
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02-27-2004, 07:50 PM
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#25
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Update: I did a closer study of the shop manuals today. I belive you can get DRLs without the light sensor. You just need to replace your flasher relay with the DRL variant. This probably explains why the DRLs were a fairly cheap option.
To do the auto/on headlights you'll still need the dimmer switch and the light sensor and then you'll have to run 3 wires down to the IG1 connector at the top of the dash.
Yosmany at yotatech has the parts and should soon be able to verify if this works. I'll keep you all updated.
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02-27-2004, 09:11 PM
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#26
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Thanks for all of the updates! I am very interested in enabling this option! Why doesn't Toyota get with the modern times? Offer power seats and automatic headlights on all models! :jester:
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2005 4Runner Limited 4X4 V8 since 6/15/05 Titanium Silver with Grey Leather
Nav, XREAS, Adjustable Ride Height, Sunroof, Side Curtain Airbags, Rear Spoiler, Double Deck Cargo, Chrome Exhuast Tip, Bug Shield, All Weather Mats, Driver Side Assist Handle, Audiovox Remote Starter, 2006 Skid Plate, LED lighting- interior and running boards, USA-Spec PA-15
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02-27-2004, 09:29 PM
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#27
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Oh I'm with you there. Don't forget standard lighted vanity mirrors, standard autodimming mirrors and leather as an option.
Might as well give you the chance to get the supercharger as an option too.
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02-27-2004, 09:49 PM
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#28
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rando, I forgot about all of those. You are 100% right. I got an autodimming mirror like the Limited, but it took a little work to find one that is a Toyota part and fits the 4Runner. :rocker:
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2005 4Runner Limited 4X4 V8 since 6/15/05 Titanium Silver with Grey Leather
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02-28-2004, 11:51 PM
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#29
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Quote:
Originally posted by rando
OK, so I think we are saying the same thing or nearly the same thing. In the end, I believe it comes down to economics. I don't presume to know how Toyota's assembly lines are configured nor all of the factors that go into their decision to make one or many harnesses.
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Please let us know. I almost bought the flasher relay to try it out.. but i will wait and see what you come up with.
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02-29-2004, 12:30 AM
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#30
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gregtay, if you just want DRLs, you only need the flasher relay. I have no plans to try this since I'm not interested in DRLs.
I'm really looking for towards the auto/on headlights. To get those, you need the light sensor and the limited dimmer switch. This will also REQUIRE some minor custom wiring since the SR5/Sport harness for the sensor is different from the Limited harness.
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