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Dimmer Control, One goes up, one down


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mikew04 
Copper - Posts: 52
Copper spacespace
Joined: March 16, 2004
Location: United States
Posted: March 23, 2004 at 8:41 PM / IP Logged  
When i wired up my HU, i also wired the dimmer. The problem is that when i turn the dimmer up, the HU lights get dimmer,... and when i turn the dimmer down, the HU gets brighter while the dash lights get dimmer (except if its turned all the way over, then everythings bright). Is there a fix?
BTW its a Blaupunkt HU and a Toyota Celica
Thanks
Ketel22 
Silver - Posts: 976
Silver spacespace
Joined: August 23, 2003
Location: United States
Posted: March 23, 2004 at 8:47 PM / IP Logged  
did you by some means reverse something?
Quad L Handyman services
RufNUSD 
Copper - Posts: 184
Copper spacespace
Joined: December 10, 2002
Location: United States
Posted: March 23, 2004 at 9:00 PM / IP Logged  
Is it connected to the org.blk or the org.wht off of your 70*1761. It should connect to the org.wht.
Someone pass me that bottle.
mikew04 
Copper - Posts: 52
Copper spacespace
Joined: March 16, 2004
Location: United States
Posted: March 23, 2004 at 9:38 PM / IP Logged  
yes, its connected to the ORANGE / white wire.
Metra Tech 
Copper - Posts: 125
Copper spacespace
Joined: October 21, 2003
Location: United States
Posted: March 24, 2004 at 10:33 AM / IP Logged  
What is connected to the ORANGE / white wire? Does your Blaupunkt have illumination inputs?
mikew04 
Copper - Posts: 52
Copper spacespace
Joined: March 16, 2004
Location: United States
Posted: March 24, 2004 at 11:54 AM / IP Logged  
The HU has a dimmer wire. That wire is connected to the ORANGE / white wire, the dimmer wire, coming out of the toyota harness.
Metra Tech 
Copper - Posts: 125
Copper spacespace
Joined: October 21, 2003
Location: United States
Posted: March 24, 2004 at 6:07 PM / IP Logged  
The problem you have is that you need an illumination wire, not a dimmer wire and Toyota does not provide that wire at the radio harness. You will have to get that wire at the input of the dimmer, any of the parking lights of the vehicle or anywhere else someone on this forum can tell you. Please use a DMM when testing your wires. You are looking for a wire that shows 12v when the lights are on, dimmer up or down.
mikew04 
Copper - Posts: 52
Copper spacespace
Joined: March 16, 2004
Location: United States
Posted: March 24, 2004 at 6:20 PM / IP Logged  
I dont need the illumination wire, the stock toyota harness has it. The HU has no illumination wire anyways, just a dimmer. ( I tested it by hooking up the ill. wire from the harness to the dimmer wire off the HU, nothing different than no wire connected at all) The HU lights up, i have no problem with that, but i want to be able to control how bright it is at night. The dimmer control works, it just does it the opposite way.
Metra Tech 
Copper - Posts: 125
Copper spacespace
Joined: October 21, 2003
Location: United States
Posted: March 25, 2004 at 10:09 AM / IP Logged  
 I guess you did not understand what I was saying. Let me explain a little better. Automotive manufacturers use three different types of lighting in vehicles, illumination which is 12v positive at all times when the lights are on, positive dimmer which is 12v positive when the lights are on, but will reduce voltage as the dimmer is turned down until it reaches ground and negative dimmer which reads  12v negative when the lights are on and will reduce voltage as the dimmer is turned down until it reaches 12v positive. In your vehicle you have a positive dimmer and a negative dimmer, NOT illumination. On your radio, it REQUIRES illumination. Your radio only dims the lights a certain degree at nightime.. So when you give an illumination input  a postive dimmer, it will reduce the lights a certain degree which is what it is designed to do, but remember, positive dimmer reduces voltage, so when you dim the dimmer, the illumination wire on the radio gets less voltage than 12v and it acts erratic. That's why your experiencing your problem and you are not the first person I have seen with this problem, this is common and to make matters worse, radio manufacturers sometimes mislabel their radios with ORANGE / white wires when they should be orange. I believe Blaupunkt does this. Believe me or not, this IS your problem, I know from experience, it is my job to know these things.
mikew04 
Copper - Posts: 52
Copper spacespace
Joined: March 16, 2004
Location: United States
Posted: March 25, 2004 at 1:31 PM / IP Logged  

OK, yah, i have an orange wire coming off of my HU that is labeled illumination... so i should wire this directly to the dimmer itself then? You said im looking for a wire with 12v when the lights are on, up or down.. wouldnt this not have any affect of the illimination? I want to be able to control the brightness of the HU.

Its interesting how the HU, HU manual, and harness all have conflicting wiring information.

Thanks for your help metra

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