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Relay Buzzes When the Dome Lights Fade Out


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Joe Neal 
Copper - Posts: 113
Copper spacespace
Joined: October 15, 2004
Location: United States
Posted: May 18, 2005 at 9:26 PM / IP Logged  
2005 Chev Tahoe with fading Dome Lights.
Have installed a SPDT Relay to convert Positive Dome Light Output to Negative Dome Light Output.
The Relay Buzzes when the Dome Lights Fade out. 
Does any one know how to correct the problem or is there something else I could use to convert Positive Dome Light to Negative
This is for a aftermarket Video Flip down, and the only Dome Light wire is a NEGATIVE Input
Ween 
Platinum - Posts: 1,366
Platinum spacespace
Joined: August 01, 2004
Location: Illinois, United States
Posted: May 18, 2005 at 10:54 PM / IP Logged  
Joe Neal 
Copper - Posts: 113
Copper spacespace
Joined: October 15, 2004
Location: United States
Posted: May 19, 2005 at 7:51 AM / IP Logged  

Done that................Has worked good on other Tahoe's, but am having a problem on this one.  Tried 3 different voltage Z-Diodes, Variable Resistor & Caps.  Still buzzes

Ween 
Platinum - Posts: 1,366
Platinum spacespace
Joined: August 01, 2004
Location: Illinois, United States
Posted: May 19, 2005 at 8:10 AM / IP Logged  

should be able to use a one amp (1N4001) diode, 2200uf cap...never had a problem using a bosch type relay.  what relay do you have?

mark

Joe Neal 
Copper - Posts: 113
Copper spacespace
Joined: October 15, 2004
Location: United States
Posted: May 19, 2005 at 9:05 AM / IP Logged  
Have used Bosch & Optilux
Both are 30/40amp, SPDT
Bench test it works fine when we drop the voltage
Tahoe, it still buzzes when Dome lights fade out.
Approx. 2.7 volts accross Cap.
????????
Joe Neal 
Copper - Posts: 113
Copper spacespace
Joined: October 15, 2004
Location: United States
Posted: May 19, 2005 at 9:10 AM / IP Logged  

This is how I did it last year and it worked great:

https://www.the12volt.com/installbay/forum_posts.asp?tid=42496&KW=Joe+Neal

I must be missing something

Ween 
Platinum - Posts: 1,366
Platinum spacespace
Joined: August 01, 2004
Location: Illinois, United States
Posted: May 19, 2005 at 5:21 PM / IP Logged  

scrap the zener and potentiometer, use a 1N4001 in series on the grey/black and a 2200uf cap across the coil.  did one today in a 2005 Escalade....worked fine : )

mark

infbaffle 
Member - Posts: 13
Member spacespace
Joined: May 12, 2005
Location: United States
Posted: May 19, 2005 at 7:04 PM / IP Logged  
am I missing something? can't  you attach the relay output to the negative driver door sensor wire located in kickpanel or driver door boot?
infbaffle
infbaffle 
Member - Posts: 13
Member spacespace
Joined: May 12, 2005
Location: United States
Posted: May 19, 2005 at 7:18 PM / IP Logged  
that is, to all the door sensor wires.
infbaffle
Joe Neal 
Copper - Posts: 113
Copper spacespace
Joined: October 15, 2004
Location: United States
Posted: May 19, 2005 at 9:05 PM / IP Logged  
Trying to make a 1 step procedure.  It is for Dome lights in Flip Down Monitor that has only Negative Input.
Will try again Monday with ---1N4001 in series on the grey/black and a 2200uf cap across the coil.
If that still doesn't work will try timer

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