RWAL and License Plate light
Hi fellas, It has been a few years since my truck has caused me to seek out help on this great forum. I have had quite a year involving health issues that have caused me to park the old girl for around 5 months. Everything was hunky dory when parked, but when I used it a couple of weeks ago, the brake and RWAL lights were on. It happened while sitting, any ideas? This is killing me. The other thing is my License plate lights don't work. I don't have 12 volts at the connector to the lights, but I do at the fuse. Can both be related to a fusible link? That seems to be the only common point between the 2,[duhhh][duhhh] I Think. It all happened while parked, go figure :(, Any ideas?...Mark
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Originally Posted by maybe368
(Post 3290672)
Hi fellas, It has been a few years since my truck has caused me to seek out help on this great forum. I have had quite a year involving health issues that have caused me to park the old girl for around 5 months. Everything was hunky dory when parked, but when I used it a couple of weeks ago, the brake and RWAL lights were on. It happened while sitting, any ideas? This is killing me. The other thing is my License plate lights don't work. I don't have 12 volts at the connector to the lights, but I do at the fuse. Can both be related to a fusible link? That seems to be the only common point between the 2,[duhhh][duhhh] I Think. It all happened while parked, go figure :(, Any ideas?...Mark
Disconnect the parking brake switch and the vacuum switch (driver's side under hood) and the combination valve switch (under the MC) and see if the light goes out. They all set the brake lite, and that will set the RWAL light. Re-connect them one at a time till you find the culprit. Don't know if a pickup would be the same as my '90 B350 van, but on the van if something plugged into the cigarette lighter blew a fuse, the brake light would come on. Stupid design, but it was what it was. I believe tail lights and license plate lights are on the same circuit. Might be a dirty connector or mouse bite under the back of the box. |
My abs light came on the other week and ended up being the taillight bulb. The bulb had some corrosion and was causing a short.
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Thanks guys, I'll give all that a try tomorrow...Mark
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Originally Posted by maybe368
(Post 3290689)
Thanks guys, I'll give all that a try tomorrow...Mark
Not sure what yours is like as you're out of the salt belt, but it's another place to look when all else fails. |
In regards to the license plate lights.... There is, at least on my truck and the 91.5 donor I had, a 2-way connector (plug) on the passenger side frame rail at the rear which supplies power to the license plate sockets. Might be worth a look to see if the contacts have corroded some or by chance, it became disconnected.
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Originally Posted by jimbo486
(Post 3290838)
In regards to the license plate lights.... There is, at least on my truck and the 91.5 donor I had, a 2-way connector (plug) on the passenger side frame rail at the rear which supplies power to the license plate sockets. Might be worth a look to see if the contacts have corroded some or by chance, it became disconnected.
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That would be just fine, Mark. That 2-way connector is spliced at the main harness from the running light circuit anyhow. Black/Yellow is the signal (+) and grey is ground (-).
You must not have a short anywhere since I don't see mention of the fuse blowing. It must be disconnected (or broken) somewhere between that 2-way connector and the firewall bulkhead. Do the tail lights and other running lights work, if any? |
Originally Posted by maybe368
(Post 3290672)
Hi fellas, It has been a few years since my truck has caused me to seek out help on this great forum. I have had quite a year involving health issues that have caused me to park the old girl for around 5 months. Everything was hunky dory when parked, but when I used it a couple of weeks ago, the brake and RWAL lights were on. It happened while sitting, any ideas? This is killing me. The other thing is my License plate lights don't work. I don't have 12 volts at the connector to the lights, but I do at the fuse. Can both be related to a fusible link? That seems to be the only common point between the 2,[duhhh][duhhh] I Think. It all happened while parked, go figure :(, Any ideas?...Mark
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Trying to keep the BigRagu happy
I thought that I would close this out. The license plate light problem was that I had put the connector in an extra, identical connector that is near the same place and was unused from the factory. I plugged it into the other and it worked. I probably had no lp light since I replaced the bumper several years ago [duhhh][duhhh]. The brake and rwal lights were easier, they went out by themselves. I am thinking that it was a low vacuum problem because it kind of fixed itself by degrees. It went out for a few seconds when I started the truck, but, it came back right away. Over a few days of driving, it went out and didn't come back. Man, I am a good mechanic [coffee][coffee]...Mark
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[coffee]I love it when things fix themselves.[coffee]
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Originally Posted by mknittle
(Post 3293778)
[coffee]I love it when things fix themselves.[coffee]
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