Today's Message Index:
----------------------
1. 12:42 AM - Re: Weird power . . . (Ian's)
2. 05:25 AM - Re: Weird power . . . (Bob Steward)
Message 1
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| Subject: | Re: Weird power . . . |
Sounds like an hr joint in the LA5 supply. Check condition of the JP-6-3 plu
g near the battery box. Also there seems to be a joint where the LA5 wire ch
arges to an LA2, not sure where that is.
Ian
Sent from my iPhone
> On 17 Nov 2013, at 04:29, Gary L Vogt <teamgrumman@yahoo.com> wrote:
>
> I'm troubleshooting Cabin and Map lights not working.
>
> First thing I notice is the fuse is blown. Replaced the fuse. Nothing.
> Next, the lights are burned out. Replaced the lights. Nothing.
> I remove the plastic cover on the switch. The power wire, 51LA3, is conne
cted to the map side of the switch, not the middle.
> -- fixed that. Nothing.
> Checked for power at 51LA3 with the switch off. 12.5 volts.
> Turned on Map, then Cabin light. Nothing.
> Measured power on 51LA3 with switch on Map. 0 volts.
> Checked the fuse. Blown. Replaced. Still nothing.
> I disconnect all of the wires. I have power on 51LA3.
> - I connect it directly to the cabin light wire, no. 5LA5. Nothing.
> - I connect it to the map light, no. 5LA4. Nothing.
> I remove the wire to the side light, powered by the rheostat, wire no. 51L
B6.
> I connect 51LB6 to 5LA4. Map Light works.
> I connect 51LB6 to 5LA5. Cabin Light works.
> I connect to the middle terminals on the Cabin/Map switch. Lights work.
> I measure power on 51LA3. 12.5 volts.
> I connect 51LA3 to the side light. Nothing.
> Double check power on 51LA3. 12.5 volts.
> I leave the VOM on the 51LA3 measuring 12.5 volts. While connected, I att
ach the side light. Voltage gradually drops to 0 volts.
> - light never comes on. Double check with Map and Cabin lights. Same.
>
> ----->>>>> With the voltage on 51LA3 measuring 12.5 volts, any attempt to
load the circuit with a light drops the voltage to 0 volts.
>
> Fuse is good. Power is there. Doesn't work when light attached.
>
> This is a new one to me.
>
> PS, I checked the connection on the battery box fuse holder. It looks OK.
Clock works fine.
>
>
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Message 2
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| Subject: | Re: Weird power . . . |
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