The jumper cables were accidentally reversed while trying to…

Hello and welcome to JustAnswer. Sorry to hear you are having this problem with the Honda. My name is ***** ***** I will do all I can to see that we get it resolved.

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One of two things has happened.

1. A voltage spike has disrupted module communications.

2. A fuse has shorted.

The first thing to try is a hard reset at the battery.

Hard Reset – Disconnect both battery cables. Touch the cable ends
together (away from the battery) for 15 seconds. Reconnect the cables
Positive Cable First to avoid any voltage spikes.
Touching the cables together drains the reserve voltage in the Module
Capacitors causing the Modules to reset and re-establish
communications. This might resolve the issue.
NOTE – This procedure will erase radio, seat, mirror (ect.) memory pre-sets and the radio
code may be required.

If that does not resolve the issue, the next step will be to check ALL of the vehicle fuses with a test light.

Your 2017 Civic will have anywhere from 50 to 100 fuses depending on options.

Removing and visually inspecting each fuse is just not feasible.

Checking the fuses with a test light does not take very long if done methodically.

If you are unfamiliar with this process, here is a link to a short video that illustrates the test procedure:

https://ytcropper.com/cropped/o_5e3b841e54b87

Perform this test with the Ignition ON Key OFF.

I hope this helps.

If there is anything else I can do to assist with this issue, please include the VIN number for the Civic so that I can insure the accuracy of any documentation of information I provide.

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