How do i connect the humminbird 797c si gps to my uniden um625?

sounds to me your sat. receiver has gone out is it a internal or external receiver if external replace it if internal . . .new unit

Do a master reset on the unit. restart and cross your fingers. If this does not resolve the problem you probably have an internal fault with the GPS unit.

If the new harness / parts are listed for use with this model GPS, it should work - unless you have miswired something. Double-check your work. Make sure all connections are made up tight. Pay particular attention to the ground wire. Relying on the boat to pass ground it not reliable. Look for damaged or cut cable from power source and transducer. You may wish to troubleshoot with a meter or a test light to be sure power is available at the GPS. Good luck!

Hi!

No problem. Here's the link to your manual!

http://www.manualnguide.com/dl/15864/

Happy Boating!

If you have put power to the gps antenna then there is going to be a problem with your gps antenna. The Humminbird gps antenna gets it power from the unit. If you have done this you will need to contact our customer service group to get it resolved. There number is 800-633-1468.

Joby @ Humminbird

You can use the Navionics and also LakeMaster Cards.

I had the same problem. I talked to 3 different technicians on the Humminbird support line about it. All 3 of them confirmed that this is how their technology works. They ping the GPS satellites continuously, and at low speeds the GPS accuracy causes the speed measurement to fluctuate wildly. It smooths right out when you go faster than 3 MPH, since your boat moves far enough at that speed that the GPS accuracy is no longer a problem.

Seems like they could easily overcome this issue by averaging GPS readings over a longer time period at low speed (i.e. give the boat enough time to move far enough to eliminate the accuracy issues), but they don't do that.

It was a big issue for me since I do a lot of trolling at low speed and need an accurate speed indicator, so I returned the product and bought a Lowrance instead. Lowrance doesn't have this issue.

hello there:
here is a few links that have the manual that you can download for free

1. Humminbird 595C Manuals, Support and Troubleshooting - Fishfinder GPS Free download of Humminbird Fishfinder 595C User Manual. ... Humminbird Fishfinder 595C GPS. Need a manual? HUMMINBIRD 595C MANUAL ...www.retrevo.com/support/Humminbird-595C-GPS-manual/id/540ag515/t/2 - 96k - Cached
2. Humminbird GPS Manual and Support Information: User Manuals: Retrevo ... largest collection of user guides and manuals on the web. ... Humminbird Fishfinder 595C. Operations Manual. Humminbird HDR 400G. User Guide. Humminbird HDR 400I ...www.retrevo.com/samples/Humminbird-GPS-manuals.html - Cached

Hi!
I suspect that the software is corrupt in your unit.
Being a newer model, if it's still under warranty, contact humminbird or one of their service centers for repair:
Authorized Service Centers - Canada Bay Distributors
119 Progress Ct.
P O Box 70
North Bay, Ontario, Canada P1B 8G8
Tel: (705) 476-6010
Email: [email protected]

Mike's Reel Repair
#108-31060 Peardonville Rd
Abbotsford, BC V2T 6K5
Tel: (604)855-1119
Email: [email protected]
www.mikesreelrepair.com
PTG Electronics Ltd.
3092 Portage Ave
Winnipeg, MB R3K 0Y2
Tel: (204)831-0862
Fax: (204-888-6207
Email: [email protected]
Where to ship your items:
(if you live in the U.S.)
Humminbird
Attn: Service Dept.
678 Humminbird Lane
Eufaula, AL 36027
Who to call:
Toll-free: 1-800-633-1468
Monday - Friday
8:00am - 4:30pm CST