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SportTrac Discussion
Projects
Truck goes crazy when key is out of the ignition, Instrument cluster goes on and off, beeps, ...but I don't think it's the actual instrument cluster.
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<blockquote data-quote="Evox" data-source="post: 1041829" data-attributes="member: 74754"><p>Where is the instrument cluster voltage regulator on an ST?</p><p></p><p>I removed the cluster to have a look to see if there was anything obvious and found nothing. In the process, I also disconnected the light/dimmer switch. Disconnected the PCM, took apart the ignition switch, and removed the ignition lock cylinder. When I reconnected the cluster and reconnected the battery, the instrument cluster did its glitch after a few minutes. </p><p></p><p>It's almost like something has to heat up to get it glitching. But once it starts, it continues until the fuse F1-25 is removed, the battery is disconnected, or the truck is started. Once running, everything operates normally. All the gauges work. </p><p></p><p>I checked every plug and wire I could find. I also checked all the relays in the auxiliary relay box above and to the right of the gas peddle. </p><p></p><p>So what I know so far.</p><p></p><p>>it's not a relay or fuse</p><p>>it's not the PCM</p><p>>it's not the ignition switch</p><p>>it's not the ignition lock cylinder or the ignition actuator arms. </p><p>>it's not the headlight switch</p><p></p><p><strong><em>The only thing I'm really left with at this point is the instrument cluster</em></strong>. But again, the cluster works great when the truck is running; this instrument cluster problem only occurs when the truck is off. If I don't manually shut off the radio, it will come on and go off. If I don't turn the dimmer switch all the way down to the interior light-off position, then they'll come on and off. </p><p></p><p>This is not your typical instrument cluster failure. Or at least it's not manifesting itself like your typical instrument cluster failure.</p></blockquote><p></p>
[QUOTE="Evox, post: 1041829, member: 74754"] Where is the instrument cluster voltage regulator on an ST? I removed the cluster to have a look to see if there was anything obvious and found nothing. In the process, I also disconnected the light/dimmer switch. Disconnected the PCM, took apart the ignition switch, and removed the ignition lock cylinder. When I reconnected the cluster and reconnected the battery, the instrument cluster did its glitch after a few minutes. It's almost like something has to heat up to get it glitching. But once it starts, it continues until the fuse F1-25 is removed, the battery is disconnected, or the truck is started. Once running, everything operates normally. All the gauges work. I checked every plug and wire I could find. I also checked all the relays in the auxiliary relay box above and to the right of the gas peddle. So what I know so far. >it's not a relay or fuse >it's not the PCM >it's not the ignition switch >it's not the ignition lock cylinder or the ignition actuator arms. >it's not the headlight switch [B][I]The only thing I'm really left with at this point is the instrument cluster[/I][/B]. But again, the cluster works great when the truck is running; this instrument cluster problem only occurs when the truck is off. If I don't manually shut off the radio, it will come on and go off. If I don't turn the dimmer switch all the way down to the interior light-off position, then they'll come on and off. This is not your typical instrument cluster failure. Or at least it's not manifesting itself like your typical instrument cluster failure. [/QUOTE]
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SportTrac Discussion
Projects
Truck goes crazy when key is out of the ignition, Instrument cluster goes on and off, beeps, ...but I don't think it's the actual instrument cluster.
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