Gentlemen and Ladies, thanks for considering my problem.
I'll try to be brief, but thorough. I've searched the internet for countless hours, but none of the suggested solutions seem to fix my dilemma.
I have a 2006 3.0L Vulcan SE. Been driving it for about 4 years. Great car. I keep up on all recommended maintenance. It's at around 105k miles, currently. Everything appears to be OEM
, other than standard maintenance replacements like tires and brakes, etc. Standard RCU
(non-Mach). I rarely, turn the volume past halfway and typically around 3 to 4 notches on the display.
Everything has been running perfectly all these years... until recently...
Over the last several weeks my speakers have started to cut out intermittently. All sound just stops for a second and comes back. This occurs on all sources (FM, AM, CD). Nothing else cuts out; all display lights stay on.
It never does it while sitting still. Whether the engine is running or on Acc
power, the speakers continue without interruption. It only seems to occur after I've been driving several minutes and even then, only once I get up to 50mph or above. Hitting bumps do NOT
seem to affect whether or not it occurs. Dropping below 50mph seems to "fix" it.
Although, it has happened maybe once or twice below 50mph, but only in the last few days. Problem getting worse? Hot weather, perhaps? Also, a week or so ago, the weather got considerably cooler and I did not observe any cut-outs on that day. Fluke? Or pertinent?
What I've tried so far:
Pulled the door panels and looked at all the wiring. Connections to speakers are well designed and I don't see how any wires might be shorting to ground, unless I overlooked something. I have a printout of the wiring diagram from the wiki.
Jiggled wire harness in multiple places. Tapped on various body panels, door panels, dash, etc., but could not replicate problem. Pulled the ICP
in the dash and reseated connections. Lots of jiggling of wires, but never once made the speakers cut out.
Took my multimeter to the back of the RCU
and checked voltage to power wire. On Acc
(engine off, radio on), I'm getting 12.4 volts. With engine running, voltage goes up into the 13s (forgot to note exact #). Is there something else I should be metering for? Will it only show while the speakers actually cut out?
Then, I acquired a MACH RCU
with tweeters and installed. Still the same exact problem so bad RCU
wasn't causing it. At the same time, I sanded and smoothed the body grounds for the battery to chassis and in the trunk for the black/green RCU
ground to chassis. Also applied dielectric grease. Also, cleaned both positive and negative battery terminals. Battery is less than a year old.
After several years of perfect performance, speakers are cutting out only above 50mph. Unaffected by bumps. Still occurring after replacing amp. The usual internet suggestions haven't helped.
Could it be weather related? As best as I can tell it has seemed to have started with the increase in summer temperature. I can't be certain of that, though, because the temp hasn't fallen low enough or often enough to make anything more than an assumption.
I'm not a rich man, but I am well versed in turning wrenches so it seems silly to pay someone money to fix a problem that I'm capable of doing, myself. I just need to know what the cause of the problem is so I can repair it. Can anyone help me?
Thanks and regards,