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Installing a CS-800D into a 2004 Jeep Grand Cherokee

Will001

Member
Joined
Dec 1, 2016
Messages
496
Location
Pine Ridge, SC
Howdy folks,
I have a CS-800D that I would like to install in my Jeep. My goal is to "hardwire" the radio and make it a permanent install. Through the research I've done online, there seems to be two answers to the question of wiring. Some say to run the positive wire to the fuse box and the negative wire to a screw on the vehicle's chassis, while others say to run the positive wire straight to the battery and the negative to the chassis. Both wires have 15A fuses already attached, so would this mean that I don't have to run it to the fuse box? Please pardon my ignorance on this topic, I haven't hardwired a radio in a vehicle before.
 

mmckenna

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Joined
Jul 27, 2005
Messages
13,859
Location
SNCZCA01DS0
Installation guides for commercial two way radios will always instruct you to run your positive power lead directly to the positive battery post, and your negative power lead to chassis ground. You can leave the fuse on the negative lead, or remove it, it will not serve a purpose if you are connecting to chassis ground.

Tapping into existing wiring is a bad idea on many levels:
1. Existing wiring may be undersized for the current draw of the radio.
2. Existing wiring is often bundled in with all kinds of other vehicle electronics. That creates an easy path for all the RF noise generated by the vehicle to get into your radio.
 

cmjonesinc

Member
Premium Subscriber
Joined
Apr 25, 2011
Messages
904
I've found that running the power straight to the battery and fusing it there while keeping the ground short as possible to be best. A good short well connected body ground has always worked good for me. I will however usually add in a relay on my positive wire triggered by an ignition source to turn the radio on and off as I'm forgetful. You can pick up an add a fuse tap at any parts store that will make adding the trigger for the relay easy.
 
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