2004 Jeep Grand Cherokee 2.7 Overland

[paulbassani]

Morning everyone. Have an issue with my 2004 jeep wj 2.7. Standing still rev the jeep to say about 2500 revs. Keep it constant, the minute I put my foot on the brake the revs come down to 900 revs. Take foot off the brake and revs go back up again

I plug the hose. Remove the cable off the abs. Remove the rear tail lights. Still does the same thing. Just a update its a overland model. I do not even press the brake pedal all the way down just enough to trigger the switch

Only when I pull the abs unit. But what is funny when at idle the brake press does nothing. Only if I rev above 1200 revs. Everything I have tried on the brake side does nothing. Really stumped now

[paulbassani]

So just an update. Tracked it down to the primary brake switch input to ECU. When i remove it then it does not lower the revs. Taken around the block and no issues on cruise control or anything else. Will keep everyone updated.