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Discussion Starter · #1 ·
Here's a good one. I got a fairly good deal on a '93 240 with a sunroof and have owned if for two weeks now. I've been looking it over and it's in very good condition. Someone even added daytime running lights, or so I thought. The lights seem to be on whenever they feel like. At first I thought some former owner had installed a photo cell to detect outside light for automatic headlights. <p>I finally figured it out. The other day I pulled into the driveway during the day and the headlights (and all the other outside lights) were on. I could see them reflecting off the garage door. Before killing the ignition, I happened to turn the radio off. The headlights went off. I turned the radio on, the headlights went on.<p>With the radio off the headlight switch works normally. With the radio on, the headlights, tail lights, etc. light and the switch has no effect. It's an aftermarket Sanyo radio that a former owner installed of had installed. They did a nice job and even the power antenna works fine.<p>Obviously someone somehow wired the radio power to the wrong side of the headlight relay. My questions are;<p>1. Has anyone ever heard of a goofup like this?<br>2. Has anyone ever heard of someone doing this deliberately?<br>3. Is there a way to download or otherwise get a clearer electrical wiring diagram than the Berkley manual has?<p>Thanks, so it goes,<br>Mark
 

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Re: The Radio - Headlight connection. (Mark's 240)

Do you want the headlights to function as original?<p>George Dill<p>
 

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Re: The Radio - Headlight connection. (gdill2)

....Personally i think this is hillarious, apart from being required to listen to music at night.<p>i can see it now, he will get pulled over for something rediculous and the cop will tell him to turn off his radio, and the headlights go off, and then the cop says what the... turn your headlights on... and it continues until the cop gets it. he laughs so hard that he waves you off and you speed off listening to "holiday" by madonna for some unknown reason.<p>anyway well i hope you get this fixed. and whats a berkley manual? <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0">
 

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Re: The Radio - Headlight connection. (gdill2)

Oopps, I meant the Bentley Manual. Yes, I would like to get the lights working back to normal. <p>I've been thinking that since my teenagers use this car, and since they have a tendency to blast the radio, I would like to get it back to normal. <p>It seems the radio is getting it's power thru the relay coil for the headlights.<p>Running the radio loud, and with the cassette motor on (from using the adapter for their MP3 players) may draw eccessive current thought the coil of the light relay. Over time it may cause the relay coil to fail. In other words they may lose the headlights one night and not be able to turn them on again even with the switch. <p>I could probably figure it our using the Bentley Manual, but I thought maybe there was a better diagram somewhere.<p>Thanks,<br>Mark
 

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Re: The Radio - Headlight connection. (Mark's 240)

A wiring diagram will not tell you what has been done to your Volvo prior to your ownership.<p>You will need power to the radio from the fuse block and power to the headlight switch from the ignition switch.<p>George Dill<p>
 

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Re: The Radio - Headlight connection. (Mark's 240)

a distinct possiblity is that the headlight switch ....... <p>is being powered from the power antenna output of the radio....... perhaps the power antenna relay is powering the headlights<p>I'm doubtful that circuit, the antenna output from the radio, could handle the current of actually running the lights but I suppose it's possible<p>never been much impressed with the non-idiot proof harnesses on the volvo's or the non-first world...... but widely accepted before the rest of the world figured out the valley forge types (harnesses, connectors, and diagrams.... something GM did world class long before the rest of the world) are the cats rear... wiring diagrams<p>not a slam on the volvos...... I've wrenched a few high end Italian cars and what a nightmare...... crazy color changes<p>and I could go on about several other makes<p>sounds like somebody should have laid off the canabis when they were stabbing a radio in your ride<p>hopefully you'll be able to cipher this problem using a methodical approach and some colored pencils on your tedious wiriing diagram<BR><BR>
<i>Modified by username at 10:52 AM 3-31-2006</i>
 

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and I recall several problems stemming from the ability to move consumers and feeds around on the fuse panel......... just remove the radio to access it's harness..... remove the kick panel to access the fuse panel...... and figure out where that antenna relay is<p>should be an easy one to make right<p>I'd likely just go straight to the fuse panel with the diagram
 
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