Help...No parking lights. Where is the relay?
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Joined: Nov 2007
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RE: Help...No parking lights. Where is the relay?
ORIGINAL: floorslayer1
I think most of the lighting stuff runs through the BCM. I know blinker relaysdo as well as headlight controls. You may have a BCM problem.
ALLDATA is a fee for info service where you can buy access to all related info for a given vehicle for a year. Gives you TSB's and schematics and breakdown and assembly procedures as well as diagnostic trees. I found it minimally helpful. Diagrams were aweful and their tech support was slow and not very helpful (they just reitereated their info and or sent links to same stuff. Kind of reminded me of a parts store....I mean if those guys were so knowledgeable they'd be out diagnosing and putting the parts on for $40 hr instead of $10 behind the counter)). I've probably had better luck with a $15 Haynes manual that covers multiple years/engines/models for many years and not just one year access like Alldata gives.
I think most of the lighting stuff runs through the BCM. I know blinker relaysdo as well as headlight controls. You may have a BCM problem.
ALLDATA is a fee for info service where you can buy access to all related info for a given vehicle for a year. Gives you TSB's and schematics and breakdown and assembly procedures as well as diagnostic trees. I found it minimally helpful. Diagrams were aweful and their tech support was slow and not very helpful (they just reitereated their info and or sent links to same stuff. Kind of reminded me of a parts store....I mean if those guys were so knowledgeable they'd be out diagnosing and putting the parts on for $40 hr instead of $10 behind the counter)). I've probably had better luck with a $15 Haynes manual that covers multiple years/engines/models for many years and not just one year access like Alldata gives.
I am also surprised that there isn't a Junction Block cover that has the relays listed on it (like for the PDC, or on 90% of the other cars).
Joined: Sep 2007
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RE: Help...No parking lights. Where is the relay?
Other than the parking lights and license plate lights are there any other problems or symptoms?
First check out fuse 8 (10Amps), it feeds the parking lamp relay. Also, in the power distribution center fuse 15 (20Amps) feeds this circuit.
Also, check out fuses 4 and 5 which control the left an right parking light circuits
Also, check out fuse 1 which is the feedback to the BCM that the parking light circuit is on.
Next take out the relay and check that you have two terminals with 12 Volts.
Those two provide the supply for the relay. One goes to the lights thru the relay and the other supplies the relay.
One of the other two terminals goes to the light to supply the voltage. It is this terminal that if you need to add your own switched voltage supply, I would add here.
The other terminal is what controls the relay. It goes through the BCM, which uses the Headlamp switch as an input. This is connected to ground (with some unknown resistance) by BCM to enable relay which would allow the circuit to complete on pass the relay to the lights.
Finally I would check the headlamp switch to see if it is working correctly. If you get to this I can possibly provide more info about this.
Concerning the Alldata, I would tend to agree with floorslayer1. It has been somewhat helpful. I just obtained my 96 caravan and rebuilt the transmission using my 1995 manual, alldata and help from this and other sites.
It has been helpful to get circuits for your problem
dlm4ut
First check out fuse 8 (10Amps), it feeds the parking lamp relay. Also, in the power distribution center fuse 15 (20Amps) feeds this circuit.
Also, check out fuses 4 and 5 which control the left an right parking light circuits
Also, check out fuse 1 which is the feedback to the BCM that the parking light circuit is on.
Next take out the relay and check that you have two terminals with 12 Volts.
Those two provide the supply for the relay. One goes to the lights thru the relay and the other supplies the relay.
One of the other two terminals goes to the light to supply the voltage. It is this terminal that if you need to add your own switched voltage supply, I would add here.
The other terminal is what controls the relay. It goes through the BCM, which uses the Headlamp switch as an input. This is connected to ground (with some unknown resistance) by BCM to enable relay which would allow the circuit to complete on pass the relay to the lights.
Finally I would check the headlamp switch to see if it is working correctly. If you get to this I can possibly provide more info about this.
Concerning the Alldata, I would tend to agree with floorslayer1. It has been somewhat helpful. I just obtained my 96 caravan and rebuilt the transmission using my 1995 manual, alldata and help from this and other sites.
It has been helpful to get circuits for your problem
dlm4ut
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Joined: Nov 2007
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RE: Help...No parking lights. Where is the relay?
Alright, here is what I did so far today.
I disconnected the battery and unplugged the 40A fuse that feeds the relay. Then I inserted a wire/test lead into the fuse slot. Setting my multimeter to continuity check, I removed all the relays (one by one) and tested the sockets. The relays 10, 11 and 12 in the Junction block all had continuity to the park lamp fuse. For relays 10 and 12, two connectors in the sockets were wired (connectors 2 and 3). For relay 11, only one connector (#30) was wired. From the schematic, it shows that 30 and 86 are supposed to be connected. I think this indicates a broken wire or something, so I'm going to try to check behind the junction block.
I also tested the relays by connecting them each to 12V (on the appropriate connectors) and checking for the click. The resistivity of the coils was also correct, so I doubt that the relays are the problem.
I disconnected the battery and unplugged the 40A fuse that feeds the relay. Then I inserted a wire/test lead into the fuse slot. Setting my multimeter to continuity check, I removed all the relays (one by one) and tested the sockets. The relays 10, 11 and 12 in the Junction block all had continuity to the park lamp fuse. For relays 10 and 12, two connectors in the sockets were wired (connectors 2 and 3). For relay 11, only one connector (#30) was wired. From the schematic, it shows that 30 and 86 are supposed to be connected. I think this indicates a broken wire or something, so I'm going to try to check behind the junction block.
I also tested the relays by connecting them each to 12V (on the appropriate connectors) and checking for the click. The resistivity of the coils was also correct, so I doubt that the relays are the problem.
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Joined: Oct 2016
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It's not the Relay
I used deduction, time and a multimeter to find that the source was a bad wire.
Start at the bad bulb and work your way to the battery.
You can play with the Relays and fuses first like I did. But, in the rear end I found that after I unconnected the trailer wiring, I just plugged the tail lights back in, it all worked. It was beautiful.
Start at the bad bulb and work your way to the battery.
You can play with the Relays and fuses first like I did. But, in the rear end I found that after I unconnected the trailer wiring, I just plugged the tail lights back in, it all worked. It was beautiful.