It is the radio ignition fuse. Used on the power signal wire for the radio.
There are two fuses marked RDO inside the fuse block located on the driver's side dash. One fuse is Marked RDO BATT which is 15Amps and in location 19, the other is marked RDO IGN, a 10 Amp fuse in the 24 position.
Under the hood on the drivers side is the main fuse box. You should see a 20A mini fuse that is labeled RDO/IGN or just IGN. I believe that this also affects the cigarette lighter/ 12v plug. Good luck!
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Both are in the left hand lower dash fuse panel, one is Radio or RDO, and the other is CIG or DOME, all must work for the radio to Function. Relentless
For the lighter up front on dash its under hood on drivers sideits at top with 2 other 20 amp fuses , its labeled as IP IGN next to RDO EWD/RR WPR
Rdo and it should be a 25 watt fuse
The fuse is under the hood, marked rdo almost centered in fuse box.
check the radio fuse (rdo) under the hood, it should be 15 amps
check the RDO fuse in the fuse box under the hood located on the driver side of the vehicle.
All fuses are in the under hood fuse box. The lid has them numered and labled. Look for RDO, and another that also feeds a power outlet.
It should be in the fuse/relay center under the hood. Remove the fuse/relay center cover and look at the layout on the backside of the cover. You should see a 20 amp yellow mini fuse that protects the radio circuit (marked RDO) the same fuse covers a couple other circuits as well.
If it's in the same location as my 1998 (and I know they use the same wiring diagrams) it would be on the drivers side of the dash. Open your driver's door and look at the side of the dash (around the corner from the far left dash vent) there's a pull-out panel and behind are fuses. On the inside of the removeable panel is the fuse layout. Mine is marked #19 Rdo Bat and is the bottom far left fuse. Hope this helps. Ps. I was perusing this site looking for information for my own personal car issue and God put it on my heart to help a few people out, so I'm trying.