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06-12-07, 07:11 AM
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#1 (permalink)
| | Rookie
Join Date: Jul 2003 Location: Pittsburgh
Posts: 8
|  Dumb/Easy Electrical Question
Hi guys,
Here is a bit of a dumb question. I wanted to add two fuse blocks in the engine compartment for accessories (like many of the guys on this forum have done).
One Fuse block will be 12v BAT and the other will be 12v Switched (to Ignition).
Here is my question: Inside the engine comparment, where is a good place to tap into 12v switched? (12v Bat is pretty obvious). The coil has two lines a grey line and a red line. Is either one of these a good candidate? I'd hate to weaken the ignition signal to the coil.
Thanks,
Rod Diaz
'96 LX450
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06-12-07, 07:13 AM
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#2 (permalink)
| | fatherofdaughterofromer
Join Date: Sep 2003 Location: Centennial, Colorado
Posts: 7,997
| I tied in at the battery
__________________ Ken Romer ~ Friend of Shaman
Keeper of the FAQ, Defender of Newbies, and Slayer of Tards
Commander Rising Sun 4WD Club - K0ROM
97 LX450, Supercharged, Locked, and lots of other stuff ROTW
96 LX450 - ROD's
06 4Runner - Wife's
99 4Runner - daughterofromer's
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06-12-07, 12:06 PM
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#3 (permalink)
| | Rookie
Join Date: Jul 2003 Location: Pittsburgh
Posts: 8
| How is that switched? I need a source that has no power when the ignition switch is in the off position.
Thanks,
Rod | |
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06-12-07, 12:10 PM
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#4 (permalink)
| | Forum Lifer
Join Date: Nov 2004 Location: Pasadena, CA
Posts: 2,554
| Quote:
Originally Posted by Romer  I tied in at the battery | X2 ^ same here Quote:
Originally Posted by Roddiaz1 How is that switched? I need a source that has no power when the ignition switch is in the off position.
Thanks,
Rod | Easy, The wire to cigarette lighter. | |
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06-12-07, 12:13 PM
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#5 (permalink)
| | Danke!
Join Date: May 2005 Location: Phoenix
Posts: 4,456
| If you're putting in a fuse block, you're probably thinking of drawing a significant amount of current. You won't find a switched power wire capable of doing that. Rather, you can use any switched lead in conjunction with a relay to switch a high-amperage wire directly from the battery.
-Spike
__________________
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06-12-07, 12:23 PM
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#6 (permalink)
| | 250+ Club
Join Date: Apr 2007 Location: Seattle Area
Posts: 341
| Quote:
Originally Posted by -Spike- If you're putting in a fuse block, you're probably thinking of drawing a significant amount of current. You won't find a switched power wire capable of doing that. Rather, you can use any switched lead in conjunction with a relay to switch a high-amperage wire directly from the battery.
-Spike | What he said.
__________________
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200K on chassi, 82K on long block, USA, WA
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06-13-07, 06:51 AM
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#7 (permalink)
| | Rookie
Join Date: Jul 2003 Location: Pittsburgh
Posts: 8
| Relay
Yes, the relay is a great idea. I'll go with that.
As far as the ciraget lighter, mine is always hot. Ignition on or off. Not sure if that's because I have LX 450 or because it got re-wired by someone else (PO).
Thanks for the ideas,
Rod | |
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06-13-07, 10:37 AM
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#8 (permalink)
| | The quick brown fox .....
Join Date: Mar 2003 Location: Somewhere in the foothills...
Posts: 11,902
| Quote:
Originally Posted by Roddiaz1 Yes, the relay is a great idea. I'll go with that.
As far as the ciraget lighter, mine is always hot. Ignition on or off. Not sure if that's because I have LX 450 or because it got re-wired by someone else (PO).
Thanks for the ideas,
Rod | Stock wiring on your LX450 would mean the cig lighter socket is switched with the ignition. If yours is always hot it is not stock. Check to be sure you have proper fusing to this modified 12v outlet. The stock assembly also has a tiny fusible link on the back of the cig lighter receptacle; in addition to the 5amp (IIRC) fuse in the fuse panel to the left of the steering wheel.
-B-
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Romer
1997 Lexus LX450
-Spike-
